10-Q

  UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended November 30, 2019

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _________ to __________

Commission file number: 000-22893

AEHR TEST SYSTEMS

(Exact name of Registrant as specified in its charter)

California	94-2424084
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

400 Kato Terrace Fremont, CA	94539
(Address of principal executive offices)	(Zip Code)

(510) 623-9400

(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☐	Accelerated filer ☐
Non-accelerated filer ☒	Smaller reporting company ☒
	Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock	AEHR	The NASDAQ Capital Market

Number of shares of the registrant’s common stock, $0.01 par value, outstanding as of December 31, 2019 was 22,915,648.

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AEHR TEST SYSTEMS

FORM 10-Q

FOR THE QUARTER ENDED NOVEMBER 30, 2019

INDEX

PART I.	FINANCIAL INFORMATION
ITEM 1.	Financial Statements (Unaudited)
	Condensed Consolidated Balance Sheets at November 30, 2019 and May 31, 2019	4
	Condensed Consolidated Statements of Operations for the Three and Six Months Ended November 30, 2019 and 2018	5
	Condensed Consolidated Statements of Comprehensive Income (Loss) for the Three and Six Months Ended November 30, 2019 and 2018	6
	Condensed Consolidated Statements of Shareholders’ Equity for the Three and Six Months Ended November 30, 2019 and 2018	7
	Condensed Consolidated Statements of Cash Flows for the Three and Six Months Ended November 30, 2019 and 2018	8
	Notes to Condensed Consolidated Financial Statements	9
ITEM 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	22
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risks	27
ITEM 4.	Controls and Procedures	28
PART II.	OTHER INFORMATION
ITEM 1.	Legal Proceedings	29
ITEM 1A.	Risk Factors	29
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds	29
ITEM 3.	Defaults Upon Senior Securities	29
ITEM 4.	Mine Safety Disclosures	29
ITEM 5.	Other Information	29
ITEM 6.	Exhibits	29
	SIGNATURES	30

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PART I. FINANCIAL INFORMATION

Item 1. FINANCIAL STATEMENTS (Unaudited)

AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except per share data)

(unaudited)

	November 30,	May 31,
	2019	2019
		(1)
ASSETS
Current assets:
Cash and cash equivalents	$5,302	$5,428
Accounts receivable, net	5,231	4,859
Inventories	9,800	9,061
Prepaid expenses and other current assets	534	686
Total current assets	20,867	20,034
Property and equipment, net	860	1,045
Operating lease right-of-use assets	2,387	--
Other assets	186	228
Total assets	$24,300	$21,307
LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
Accounts payable	$2,320	$1,933
Accrued expenses	1,596	2,034
Operating lease liabilities, short-term	619	--
Customer deposits and deferred revenue, short-term	1,809	1,545
Total current liabilities	6,344	5,512
Operating lease liabilities, long-term	1,924	--
Deferred rent	--	153
Deferred revenue, long-term	64	189
Total liabilities	8,332	5,854
Aehr Test Systems shareholders' equity:
Common stock, $0.01 par value:     Authorized: 75,000 shares;
Issued and outstanding: 22,914 shares and 22,669 shares at November 30, 2019 and May 31, 2019, respectively	229	227
Additional paid-in capital	85,194	84,499
Accumulated other comprehensive income	2,211	2,230
Accumulated deficit	(71,646)	(71,484)
Total Aehr Test Systems shareholders' equity	15,988	15,472
Noncontrolling interest	(20)	(19)
Total shareholders' equity	15,968	15,453
Total liabilities and shareholders' equity	$24,300	$21,307

(1) The condensed consolidated balance sheet at May 31, 2019 has been derived

from the audited consolidated financial statements at that date.

The accompanying notes are an integral part of these

condensed consolidated financial statements.

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AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(unaudited)

	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Net sales	$6,874	$5,911	$12,407	$10,651
Cost of sales	3,672	3,513	6,934	6,700
Gross profit	3,202	2,398	5,473	3,951
Operating expenses:
Selling, general and administrative	2,157	1,977	3,965	3,856
Research and development	795	986	1,687	2,102
Total operating expenses	2,952	2,963	5,652	5,958
Income (loss) from operations	250	(565)	(179)	(2,007)
Interest income (expense), net	2	(74)	14	(152)
Other income, net	5	29	15	38
Income (loss) before income tax expense	257	(610)	(150)	(2,121)
Income tax expense	(6)	(19)	(12)	(23)
Net income (loss)	251	(629)	(162)	(2,144)
Less: Net income attributable to the noncontrolling interest	--	--	--	--
Net income (loss) attributable to Aehr Test Systems common shareholders	$251	$(629)	$(162)	$(2,144)
Net income (loss) per share
Basic	$0.01	$(0.03)	$(0.01)	$(0.10)
Diluted	$0.01	$(0.03)	$(0.01)	$(0.10)
Shares used in per share calculations:
Basic	22,823	22,294	22,765	22,242
Diluted	22,912	22,294	22,765	22,242

The accompanying notes are an integral part of these

condensed consolidated financial statements.

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AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(in thousands, unaudited)

	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Net income (loss)	$251	$(629)	$(162)	$(2,144)
Other comprehensive income (loss), net of tax:
Net change in cumulative translation, adjustments	(5)	(34)	(20)	(49)
Total comprehensive income (loss)	246	(663)	(182))	(2,193)
Less: Comprehensive income attributable to the noncontrolling interest	--	1	(1)	2
Comprehensive income (loss), attributable to Aehr Test Systems common shareholders	$246	$(664)	$(181)	$(2,195)

The accompanying notes are an integral part of these

condensed consolidated financial statements.

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AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(in thousands)

(unaudited)

						Total Aehr
				Accumulated		Test
			Additional	Other		Systems		Total
	Common Stock		Paid-in	Comprehensive	Accumulated	Shareholders’	Noncontrolling	Shareholders'
Three Months Ended November 30, 2019	Shares	Amount	Capital	Income	Deficit	Equity	Interest	Equity
Balances, August 31, 2019	22,721	$227	$84,760	$2,216	$(71,897)	$15,306	$(20)	$15,286
Issuance of common stock under employee plans	193	2	229	--	--	231	--	231
Stock-based compensation	--	--	205	--	--	205	--	205
Net loss	--	--	--	--	251	251	--	251
Foreign currency translation adjustment	--	--	--	(5)	--	(5)	--	(5)
Balances, November 30, 2019	22,914	$229	$85,194	$2,211	$(71,646)	$15,988	$(20)	$15,968

						Total Aehr
				Accumulated		Test
			Additional	Other		Systems		Total
	Common Stock		Paid-in	Comprehensive	Accumulated	Shareholders’	Noncontrolling	Shareholders'
Six Months Ended November 30, 2019	Shares	Amount	Capital	Income	Deficit	Equity	Interest	Equity
Balances, May 31, 2019	22,669	$227	$84,499	$2,230	$(71,484)	$15,472	$(19)	$15,453
Issuance of common stock under employee plans	245	2	291	--	--	293	--	293
Stock-based compensation	--	--	404	--	--	404	--	404
Net loss	--	--	--	--	(162)	(162)	--	(162)
Foreign currency translation adjustment	--	--	--	(19)	--	(19)	(1)	(20)
Balances, November 30, 2019	22,914	$229	$85,194	$2,211	$(71,646)	$15,988	$(20)	$15,968

						Total Aehr
				Accumulated		Test
			Additional	Other		Systems		Total
	Common Stock		Paid-in	Comprehensive	Accumulated	Shareholders’	Noncontrolling	Shareholders'
Three Months Ended November 30, 2018	Shares	Amount	Capital	Income	Deficit	Equity	Interest	Equity
Balances, August 31, 2018	22,245	$222	$83,405	$2,276	$(67,764)	$18,139	$(19)	$18,120
Issuance of common stock under employee plans	111	2	201	--	--	203	--	203
Stock-based compensation	--	--	224	--	--	224	--	224
Net income	--	--	--	--	(629)	(629)	--	(629)
Foreign currency translation adjustment	--	--	--	(35)	--	(35)	1	(34)
Balances, November 30, 2018	22,356	$224	$83,830	$2,241	$(68,393)	$17,902	$(18)	$17,884

						Total Aehr
				Accumulated		Test
			Additional	Other		Systems		Total
	Common Stock		Paid-in	Comprehensive	Accumulated	Shareholders’	Noncontrolling	Shareholders'
Six Months Ended November 30, 2018	Shares	Amount	Capital	Income	Deficit	Equity	Interest	Equity
Balances, May 31, 2018	22,143	$221	$83,041	$2,292	$(66,249)	$19,305	$(20)	$19,285
Issuance of common stock under employee plans	213	3	309	--	--	312	--	312
Stock-based compensation	--	--	480	--	--	480	--	480
Net income	--	--	--	--	(2,144)	(2,144)	--	(2,144)
Foreign currency translation adjustment	--	--	--	(51)	--	(51)	2	(49)
Balances, November 30, 2018	22,356	$224	$83,830	$2,241	$(68,393)	$17,902	$(18)	$17,884

The accompanying notes are an integral part of these

condensed consolidated financial statements.

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AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

	Six Months Ended
	November 30,
	2019	2018
Cash flows from operating activities:
Net loss	$(162)	$(2,144)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	404	480
Recovery of doubtful accounts	--	(3)
Depreciation and amortization	193	230
Changes in operating assets and liabilities:
Accounts receivable	(372)	(1,068)
Inventories	(627)	(935)
Prepaid expenses and other assets	194	23
Accounts payable	389	302
Accrued expenses	(438)	(175)
Customer deposits and deferred revenue	139	231
Deferred rent	--	84
Income taxes payable	4	18
Net cash used in operating activities	(276)	(2,957)
Cash flows from investing activities:
Purchases of property and equipment	(123)	(103)
Net cash used in investing activities	(123)	(103)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee plans, net of taxes paid related to share settlement of equity awards	293	312
Net cash provided by financing activities	293	312
Effect of exchange rates on cash and cash equivalents	(20)	(98)
Net decrease in cash, cash equivalents and restricted cash	(126)	(2,846)
Cash, cash equivalents and restricted cash, beginning of period	5,508	16,848
Cash, cash equivalents and restricted cash, end of period	$5,382	$14,002
Supplemental disclosure of non-cash flow information:
Transfers of property and equipment to inventories	$112	$--

The accompanying notes are an integral part of these

condensed consolidated financial statements.

8

AEHR TEST SYSTEMS

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES

    The accompanying financial information has been prepared by Aehr Test Systems, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission, or SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (GAAP) have been condensed or omitted pursuant to such rules and regulations.

    In the opinion of management, the unaudited condensed consolidated financial statements for the interim periods presented have been prepared on a basis consistent with the May 31, 2019 audited consolidated financial statements and reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the condensed consolidated financial position and results of operations as of and for such periods indicated. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended May 31, 2019. Results for the interim periods presented herein are not necessarily indicative of results which may be reported for any other interim period or for the entire fiscal year.

    PRINCIPLES OF CONSOLIDATION. The condensed consolidated financial statements include the accounts of Aehr Test Systems and its subsidiaries (collectively, the "Company"). All significant intercompany balances have been eliminated in consolidation. For the Company’s majority owned subsidiary, Aehr Test Systems Japan K.K., the noncontrolling interest of the portion the Company does not own was reflected on the Condensed Consolidated Balance Sheets in Shareholders’ Equity and in the Condensed Consolidated Statements of Operations.

    ACCOUNTING ESTIMATES. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Estimates are used to account for sales and revenue allowances, the allowance for doubtful accounts, inventory valuations, income taxes, stock-based compensation expenses, and product warranties, among others. The Company bases its estimates on historical experience and on various other assumptions that it believes to be reasonable under the circumstances. Actual results could differ materially from those estimates.

    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES. The Company’s significant accounting policies are disclosed in the Company’s Annual Report on Form 10-K for the year ended May 31, 2019.There have been no significant changes in the Company’s significant accounting policies during the three and six months ended November 30, 2019, except for the adoption of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Update No. 2016-02, Leases, as discussed in Note “2. RECENT ACCOUNTING PRONOUNCEMENTS.”

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2. RECENT ACCOUNTING PRONOUNCEMENTS

Accounting Standards Adopted

    Financial Instruments

    In January 2016, the FASB issued an accounting standard update related to the recognition and measurement of financial assets and financial liabilities. This standard changes accounting for equity investments and financial liabilities under the fair value option and the presentation and disclosure requirements for financial instruments. In addition, this standard clarifies guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. The Company adopted this new standard in fiscal year 2020. The adoption of this standard did not have a significant impact on the Company’s consolidated financial statements.

    Leases

    In February 2016, the FASB issued ASC Update No. 2016-02, Leases (FASB ASC Topic 842, Leases). The Company adopted the standard as of June 1, 2019, using the modified retrospective approach and the transition method provided by ASC Update No. 2018-11, Leases (Topic 842): Targeted Improvements. Under this method, the Company applied the new leasing rules on the date of adoption and recognized the cumulative effect of initially applying the standard as an adjustment to its opening balance sheet, rather than at the earliest comparative period presented in the financial statements. Prior periods presented are in accordance with the previous lease guidance under FASB ASC Topic 840, Leases.

    In addition, the Company applied the package of practical expedients permitted under FASB ASC Topic 842 transition guidance to its entire lease portfolio at June 1, 2019. As a result, the Company was not required to reassess (i) whether any expired or existing contracts are or contain leases, (ii) the classification of any expired or existing leases and (iii) the treatment of initial direct costs for any existing leases. Furthermore, the Company elected not to separate lease and non-lease components for the majority of its leases. Instead, for all applicable classes of underlying assets, the Company accounted for each separate lease component and the non-lease components associated with that lease component as a single lease component.

    As a result of adopting FASB ASC Topic 842, Leases on June 1, 2019, the Company recognized right-of-use assets of $2.7 million and corresponding liabilities of $2.8 million for its existing operating lease portfolio on its unaudited condensed consolidated balance sheet. Operating lease right-of-use assets are presented within Operating lease right-of-use assets and corresponding liabilities are presented within Operating lease liabilities, short-term and Operating lease liabilities, long-term on the Company’s unaudited condensed consolidated balance sheet. There was no material impact to the Company’s unaudited condensed consolidated statements of operations or unaudited condensed consolidated statements of cash flows. Please refer to Note “11. LEASES” for information regarding the Company’s lease portfolio as of November 30, 2019 as accounted for under FASB ASC Topic 842, Leases.

Accounting Standards Not Yet Adopted

    Financial Instruments

    In June 2016, the FASB issued an accounting standard update (“ASU”) that requires measurement and recognition of expected credit losses for financial assets held based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount. Due to a subsequent ASU in November 2019, the accounting standard will be effective for the Company beginning in the first quarter of fiscal 2024 on a modified retrospective basis, and early adoption in fiscal 2020 is permitted. The Company does not expect a material impact of this accounting standard on its consolidated financial statements.

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3. REVENUE

Revenue recognition

    The Company recognizes revenue when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services by following a five-step process: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price, and (5) recognize revenue when or as the Company satisfies a performance obligation, as further described below.

    Performance obligations include sales of systems, contactors, spare parts, and services, as well as installation and training services included in customer contracts.

    A contract’s transaction price is allocated to each distinct performance obligation. In determining the transaction price, the Company evaluates whether the price is subject to refund or adjustment to determine the net consideration to which the Company expects to be entitled. The Company generally does not grant return privileges, except for defective products during the warranty period.

    For contracts that contain multiple performance obligations, the Company allocates the transaction price to the performance obligations on a relative standalone selling price basis. Standalone selling prices are based on multiple factors including, but not limited to historical discounting trends for products and services and pricing practices in different geographies.

    Revenue for systems and spares are recognized at a point in time, which is generally upon shipment or delivery. Revenue from services is recognized over time as services are completed or ratably over the contractual period of generally one year or less.

    The Company has elected the practical expedient to not assess whether a contract has a significant financing component as the Company’s standard payment terms are less than one year.

Disaggregation of revenue

    The following tables show revenues by major product categories. Within each product category, contract terms, conditions and economic factors affecting the nature, amount, timing and uncertainty around revenue recognition and cash flow are substantially similar.

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    The Company’s revenues by product category are as follows (in thousands):

	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Type of good / service:
Systems	$3,027	$3,712	$5,961	$5,518
Contactors	3,046	943	4,696	2,096
Services	801	1,256	1,750	3,037
	$6,874	$5,911	$12,407	$10,651
Product lines:
Wafer-level	$6,335	$4,226	$11,161	$6,195
Test During Burn-In	539	1,685	1,246	4,456
	$6,874	$5,911	$12,407	$10,651

    The following presents information about the Company’s operations in different geographic areas. Net sales are based upon ship-to location (in thousands):

	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Geographic region:
United States	$2,627	$4,509	$7,684	$7,204
Asia	3,529	1,334	3,867	3,068
Europe	718	68	856	379
	$6,874	$5,911	$12,407	$10,651

    With the exception of the amount of service contracts and extended warranties, the Company’s product category revenues are recognized at the point in time when control transfers to customers.

	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Timing of revenue recognition:
Products and services transferred at a point in time	$6,322	$5,272	$11,181	$9,390
Services transferred over time	552	639	1,226	1,261
	$6,874	$5,911	$12,407	$10,651

Contract balances

    A receivable is recognized in the period the Company delivers goods or provides services or when the Company’s right to consideration is unconditional. The Company usually does not record contract assets because the Company has an unconditional right to payment upon satisfaction of the performance obligation, and therefore, a receivable is more commonly recorded than a contract asset.

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    Contract liabilities include payments received in advance of performance under a contract and are satisfied as the associated revenue is recognized. Contract liabilities are reported on the Condensed Consolidated Balance Sheets at the end of each reporting period as a component of deferred revenue. Contract liabilities as of November 30, 2019 and May 31, 2019 were $1,873,000 and $1,734,000, respectively. During the three and six months ended November 30, 2019, the Company recognized $132,000 and $1,181,000, respectively, of revenues that were included in contract liabilities as of May 31, 2019.

Remaining performance obligations

    On November 30, 2019, the Company had $415,000 of remaining performance obligations, which were comprised of deferred service contracts and extended warranty contracts not yet delivered. The Company expects to recognize approximately 50% of its remaining performance obligations as revenue in fiscal 2020, and an additional 50% in fiscal 2021 and thereafter. The foregoing excludes the value of other remaining performance obligations as they have original durations of one year or less, and also excludes information about variable consideration allocated entirely to a wholly unsatisfied performance obligation.

Costs to obtain or fulfill a contract

    The Company generally expenses sales commissions when incurred as a component of selling, general and administrative expense as the amortization period is typically less than one year. Additionally, the majority of the Company’s cost of fulfillment as a manufacturer of products is classified as inventory and fixed assets, which are accounted for under the respective guidance for those asset types. Other costs of contract fulfillment are immaterial due to the nature of the Company’s products and their respective manufacturing process.

4. EARNINGS PER SHARE

    Basic earnings per share is determined using the weighted average number of common shares outstanding during the period. Diluted earnings per share is determined using the weighted average number of common shares and potential common shares (representing the dilutive effect of stock options, RSUs and ESPP shares) outstanding during the period using the treasury stock method.

    The following table presents the computation of basic and diluted net (loss) income per share attributable to Aehr Test Systems common shareholders (in thousands, except per share data):

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	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Numerator: Net income (loss)	$251	$(629)	$(162)	$(2,144)
Denominator for basic net income (loss) per share:
Weighted average shares outstanding	22,823	22,294	22,765	22,242
Shares used in basic net income (loss) per share calculation	22,823	22,294	22,765	22,242
Effect of dilutive securities	89	--	--	--
Denominator for diluted net income (loss) per share	22,912	22,294	22,765	22,242
Basic net income (loss) per share	$0.01	$(0.03)	$(0.01)	$(0.10)
Diluted net income (loss) per share	$0.01	$(0.03)	$(0.01)	$(0.10)

    For the purpose of computing diluted earnings per share, the weighted average number of potential common shares does not include stock options with an exercise price greater than the average fair value of the Company’s common stock for the period, as the effect would be antidilutive. Stock options to purchase 2,919,000 shares of common stock were outstanding as of November 30, 2019, but were not included in the computation of diluted net income per share, because the inclusion of such shares would be antidilutive. In the three months ended November 30, 2018 and six months ended November 30, 2019 and 2018, potential common shares were not included in the calculation of diluted net loss per share as the effect would be antidilutive. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for these periods are the same. Stock options to purchase 3,373,000 shares of common stock, RSUs for 38,000 shares and ESPP rights to purchase 327,000 ESPP shares were outstanding as of November 30, 2018, but were not included in the computation of diluted net loss per share because the inclusion of such shares would be antidilutive. The 2,657,000 shares convertible under the 9% Convertible Secured Notes (the “Convertible Notes”) outstanding at November 30, 2018 were not included in the computation of diluted net loss per share because the inclusion of such shares would be antidilutive.

5. FAIR VALUE OF FINANCIAL INSTRUMENTS

    The Company’s financial instruments are measured at fair value consistent with authoritative guidance. This authoritative guidance defines fair value, establishes a framework for using fair value to measure assets and liabilities, and disclosures required related to fair value measurements.

    The guidance establishes a fair value hierarchy based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon their own market assumptions. The fair value hierarchy consists of the following three levels:

Level 1 - instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets.

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Level 2 - instrument valuations are obtained from readily-available pricing sources for comparable instruments.

Level 3 - instrument valuations are obtained without observable market values and require a high level of judgment to determine the fair value.

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of November 30, 2019 (in thousands):

	Balance as of
	November 30, 2019	Level 1	Level 2	Level 3
Money market funds	$1,838	$1,838	$--	$--
Assets	$1,838	$1,838	$--	$--

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of May 31, 2019 (in thousands):

	Balance as of May 31, 2019	Level 1	Level 2	Level 3
Money market funds	$3,017	$3,017	$--	$--
Assets	$3,017	$3,017	$--	$--

    Included in Money market funds as of November 30, 2019 and May 31, 2019 is $80,000 restricted cash representing a security deposit for the Company’s United States manufacturing and office space lease.

    There were no financial liabilities measured at fair value as of November 30, 2019 and May 31, 2019.

    There were no transfers between Level 1 and Level 2 fair value measurements during the three and six months ended November 30, 2019.

    The carrying amounts of financial instruments including cash, cash equivalents, receivables, accounts payable and certain other accrued liabilities, approximate fair value due to their short maturities.

6. ACCOUNTS RECEIVABLE, NET

    Accounts receivable represent customer trade receivables. As of November 30, 2019 and May 31, 2019, there were no allowances for doubtful accounts. Accounts receivable are derived from the sale of products throughout the world to semiconductor manufacturers, semiconductor contract assemblers, electronics manufacturers and burn-in and test service companies. The Company’s allowance for doubtful accounts is based upon historical experience and review of trade receivables by aging category to identify specific customers with known disputes or collection issues. Uncollectible receivables are recorded as bad debt expense when all efforts to collect have been exhausted and recoveries are recognized when they are received.

7. INVENTORIES

    Inventories are comprised of the following (in thousands):

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	November 30,	May 31,
	2019	2019
Raw materials and sub-assemblies	$6,562	$5,471
Work in process	3,053	3,580
Finished goods	185	10
	$9,800	$9,061

8. PRODUCT WARRANTIES

    The Company provides for the estimated cost of product warranties at the time revenues are recognized on the products shipped. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of its component suppliers, the Company’s warranty obligation is affected by product failure rates, material usage and service delivery costs incurred in correcting a product failure. Should actual product failure rates, material usage or service delivery costs differ from the Company’s estimates, revisions to the estimated warranty liability would be required.

    The standard warranty period is one year for systems and ninety days for parts and service.

    The following is a summary of changes in the Company's liability for product warranties during the three and six months ended November 30, 2019 and 2018 (in thousands):

	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Balance at the beginning of the period	$192	$160	$154	$135
Accruals for warranties issued during the period	79	71	141	146
Consumption of reserves	(81)	(68)	(105)	(118)
Balance at the end of the period	$190	$163	$190	$163

    The accrued warranty balance is included in accrued expenses on the accompanying condensed consolidated balance sheets.

9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM

    Customer deposits and deferred revenue, short-term (in thousands):

	November 30,	May 31,
	2019	2019
Customer deposits	$1,458	$1,003
Deferred revenue	351	542
	$1,809	$1,545

10. INCOME TAXES

    Income taxes have been provided using the liability method whereby deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and net operating loss and tax credit carryforwards measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse or the carryforwards are utilized. Valuation allowances are established when it is determined that it is more likely than not that such assets will not be realized.

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    Since fiscal 2009, a full valuation allowance was established against all deferred tax assets as management determined that it is more likely than not that certain deferred tax assets will not be realized.

    The Company accounts for uncertain tax positions consistent with authoritative guidance. The guidance prescribes a “more likely than not” recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The Company does not expect any material change in its unrecognized tax benefits over the next twelve months. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income taxes.

11. LEASES

    The Company has only operating leases for real estate including corporate offices, warehouse space and certain equipment. A lease with an initial term of 12 months or less is generally not recorded on the condensed consolidated balance sheet, unless the arrangement includes an option to purchase the underlying asset, or renew the arrangement that the Company is reasonably certain to exercise (short-term leases). The Company recognizes lease expense on a straight-line basis over the lease term for short-term leases that the Company does not record on its balance sheet. The Company’s operating leases have remaining lease terms of 1 to 4 years.

    The Company determines whether an arrangement is or contains a lease based on the unique facts and circumstances present at the inception of the arrangement. Operating lease liabilities and their corresponding right-of-use assets are recorded based on the present value of lease payments over the expected lease term. The interest rate implicit in lease contracts is typically not readily determinable.

    As such, the Company utilizes the appropriate incremental borrowing rate, which is the rate incurred to borrow on a collateralized basis over a similar term at an amount equal to the lease payments in a similar economic environment. Certain adjustments to the right-of-use asset may be required for items such as initial direct costs paid or incentives received.

    The weighted-average remaining lease term for the Company’s operating leases was 3.7 years at November 30, 2019 and the weighted-average discount rate was 5.5%.

    The Company’s operating lease cost was $183,000 and $366,000 for the three and six months ended November 30, 2019, respectively.

    The following table presents supplemental cash flow information related to the Company’s operating leases (in thousands):

	Three Months Ended November 30, 2019	Six Months Ended November 30, 2019
Cash paid for amounts included in the measurement of operating lease liabilities
Operating cash flows from operating leases	$184	$366

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    The following table presents the maturities of the Company’s operating lease liabilities as of November 30, 2019 (in thousands):

Fiscal year	Operating Leases
2020 (excluding the first six months of 2020)	$366
2021	754
2022	772
2023	795
2024	132
Thereafter	--
Total future minimum operating lease payments	$2,819
Less: imputed interest	276
Present value of operating lease liabilities	$2,543

12. STOCK-BASED COMPENSATION

    Stock-based compensation expense consists of expenses for stock options, restricted stock units, or RSUs, and employee stock purchase plan, or ESPP, purchase rights. Stock-based compensation expense for stock options and ESPP purchase rights is measured at each grant date, based on the fair value of the award using the Black-Scholes option valuation model, and is recognized as expense over the employee’s requisite service period. This model was developed for use in estimating the value of publicly traded options that have no vesting restrictions and are fully transferable. The Company’s employee stock options have characteristics significantly different from those of publicly traded options. For RSUs, stock-based compensation cost is based on the fair value of the Company’s common stock at the grant date. All of the Company’s stock-based compensation is accounted for as an equity instrument. See Note 10 in the Company’s Annual Report on Form 10-K for fiscal 2019 filed on August 28, 2019 for further information regarding the 2016 Equity Incentive Plan and the Amended and Restated 2006 ESPP.

    The following table summarizes the stock-based compensation expense for the three and six months ended November 30, 2019 and 2018 (in thousands):

	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Cost of sales	$19	$23	$39	$59
Selling, general and administrative	135	136	264	284
Research and development	51	65	101	137
Total stock-based compensation	$205	$224	$404	$480

    As of November 30, 2019 and 2018, there were no stock-based compensation expenses capitalized as part of inventory.

    During the three months ended November 30, 2019 and 2018, the Company recorded stock-based compensation expense related to stock options and RSUs of $163,000 and $166,000, respectively. During the six months ended November 30, 2019 and 2018, the Company recorded stock-based compensation expense related to stock options and RSUs of $313,000 and $339,000, respectively.

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    As of November 30, 2019, the total compensation expense related to unvested stock-based awards under the Company’s 2016 Equity Incentive Plan, but not yet recognized, was approximately $1,405,000, which is net of estimated forfeitures of $4,000. This expense will be amortized on a straight-line basis over a weighted average period of approximately 3.0 years.

    During the three months ended November 30, 2019 and 2018, the Company recorded stock-based compensation expense related to the ESPP of $42,000 and $58,000, respectively. During the six months ended November 30, 2019 and 2018, the Company recorded stock-based compensation expense related to the ESPP of $91,000 and $141,000, respectively.

    As of November 30, 2019, the total compensation expense related to purchase rights under the ESPP but not yet recognized was approximately $117,000. This expense will be amortized on a straight-line basis over a weighted average period of approximately 0.9 years.

Valuation Assumptions

    Valuation and Amortization Method. The Company estimates the fair value of stock options granted using the Black-Scholes option valuation model and a single option award approach. The fair value under the single option approach is amortized on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period.

    Expected Term. The Company’s expected term represents the period that the Company’s stock-based awards are expected to be outstanding and was determined based on historical experience, giving consideration to the contractual terms of the stock-based awards, vesting schedules and expectations of future employee behavior as evidenced by changes to the terms of its stock-based awards.

    Volatility. Volatility is a measure of the amounts by which a financial variable such as stock price has fluctuated (historical volatility) or is expected to fluctuate (expected volatility) during a period. The Company uses the historical volatility for the past four or five years, which matches the expected term of most of the option grants, to estimate expected volatility. Volatility for each of the ESPP’s four time periods of six months, twelve months, eighteen months, and twenty-four months is calculated separately and included in the overall stock-based compensation expense recorded.

    Risk-Free Interest Rate. The Company bases the risk-free interest rate used in the Black-Scholes option valuation model on the implied yield in effect at the time of option grant on U.S. Treasury zero-coupon issues with a remaining term equivalent to the expected term of the stock awards including the ESPP.

    Fair Value. The fair value of the Company’s stock options granted to employees for the three and six months ended November 30, 2019 and 2018 were estimated using the following weighted average assumptions in the Black-Scholes option valuation model:

	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Expected term (in years)	5	5	5	5
Volatility	0.72	0.70	0.71	0.72
Risk-free interest rate	1.60%	3.01%	1.85%	2.84%
Weighted average grant date fair value	$1.05	$1.21	$0.98	$1.38

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   The fair values of the ESPP purchase rights granted for the three and six months ended November 30, 2019 were estimated using the following weighted-average assumptions:

	Three and Six Months Ended
	November 30, 2019
Expected term (in years)	0.5-2.0
Volatility	0.62-0.71
Expected dividend	$0.00
Risk-free interest rates	1.56% - 1.81%
Estimated forfeiture rate	0%
Weighted average grant date fair value	$0.80

    During the three and six months ended November 30, 2019, ESPP purchase rights of 38,000 were granted. During the three and six months ended November 30, 2018, ESPP purchase rights of 327,000 were granted. Total ESPP shares issued during the three and six months ended November 30, 2019 and 2018 were 71,000 and 64,000 shares, respectively. As of November 30, 2019, there were 299,000 ESPP shares available for issuance.

    The following tables summarize the Company’s stock option and RSU transactions during three and six months ended November 30, 2019 (in thousands):

	Available
	Shares
Balance, May 31, 2019	1,147
Options granted	(527)
Options cancelled	151
Options expired	(119)
Balance, August 31, 2019	652
Options reserved	1,196
Options granted	(58)
Options cancelled	280
Options expired	(256)
Balance, November 30, 2019	1,814

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    The following table summarizes the stock option transactions during the three and six months ended November 30, 2019 (in thousands, except per share data):

	Outstanding Options
		Weighted
	Number	Average	Aggregate
	of	Exercise	Intrinsic
	Shares	Price	Value
Balances, May 31, 2019	3,107	$2.20	$282
Options granted	527	$1.64
Options cancelled	(151)	$1.50
Options exercised	(49)	$1.27
Balances, August 31, 2019	3,434	$2.16	$41
Options granted	58	$1.77
Options cancelled	(280)	$2.19
Options exercised	(85)	$1.06
Balances, November 30, 2019	3,127	$2.18	$358
Options fully vested and expected to vest at November 30, 2019	3,091	$2.18	$354

    The options outstanding and exercisable at November 30, 2019 were in the following exercise price ranges (in thousands, except per share data):

	Options Outstanding			Options Exercisable
	at November 30, 2019			at November 30, 2019
Range of Exercise Prices	Number Outstanding Shares	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price	Number Exercisable Shares	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price	Aggregate Intrinsic Value
$1.09-$1.28	260	0.57	$1.28	260	0.57	$1.28
$1.64-$2.06	1,199	5.53	$1.76	447	4.22	$1.81
$2.10-$2.81	1,439	3.13	$2.43	1,146	2.48	$2.43
$3.46-$3.93	229	4.66	$3.85	151	4.69	$3.80
$1.09-$3.93	3,127	3.95	$2.18	2,004	2.79	$2.25	$219

    The total intrinsic value of options exercised during the three and six months ended November 30, 2019 was $50,000 and $67,000, respectively. The total intrinsic value of options exercised during the three and six months ended November 30, 2018 was $23,000 and $162,000, respectively. The weighted average remaining contractual life of the options exercisable and expected to be exercisable at November 30, 2019 was 3.93 years.

    There were no RSUs granted to employees during the three and six months ended November 30, 2019 and 2018. During the three and six months ended November 30, 2019, 3,000 and 7,000 RSUs became fully vested, respectively. During the three and six months ended November 30, 2018, 4,000 and 9,000 RSUs became fully vested, respectively. As of November 30, 2019, 16,000 RSUs were unvested which had an intrinsic value of $31,000. As of November 30, 2018, 38,000 RSUs were unvested which had an intrinsic value of $72,000.

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13. SEGMENT INFORMATION

    The Company has only one reportable segment. The information for revenue category by type, product line, geography and timing of revenue recognition, is summarized in Note “3. REVENUE.”

    Property and equipment information is based on the physical location of the assets. The following table presents property and equipment information for geographic areas (in thousands):

	November 30,	May 31,
	2019	2019
United States	$821	$1,005
Asia	39	40
Europe	--	--
	$860	$1,045

    As of November 30, 2019, the operating lease right-of-use assets of $2,387,000 are allocated in the United States.

    There were no revenues through distributors for the three and six months ended November 30, 2019 and 2018.

    The Company’s Japanese and German subsidiaries primarily comprise the foreign operations. Substantially all of the sales of the subsidiaries are made to unaffiliated Japanese or European customers. Net sales from outside the United States include those of Aehr Test Systems Japan K.K. and Aehr Test Systems GmbH.

    Sales to the Company’s five largest customers accounted for approximately 95% and 88% of its net sales in the three and six months ended November 30, 2019, respectively. Two customers accounted for approximately 44% and 32% of the Company’s net sales in the three months ended November 30, 2019. Three customers accounted for approximately 42%, 24% and 10% of the Company’s net sales in the six months ended November 30, 2019. Sales to the Company’s five largest customers accounted for approximately 94% and 83% of its net sales in the three and six months ended November 30, 2018, respectively. Three customers accounted for approximately 55%, 13% and 13% of the Company’s net sales in the three months ended November 30, 2018. Four customers accounted for approximately 33%, 16%, 15% and 13% of the Company’s net sales in the six months ended November 30, 2018. No other customers represented more than 10% of the Company’s net sales in the three and six months ended November 30, 2019 and 2018.

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

    The following discussion of the financial condition and results of operations should be read in conjunction with the unaudited condensed consolidated financial statements and the related notes that appear elsewhere in this report and with our Annual Report on Form 10-K for the fiscal year ended May 31, 2019 and the consolidated financial statements and notes thereto.

    In addition to historical information, this report contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements in this report, including those made by our management, other than statements of historical fact, are forward-looking statements. These statements typically may be identified by the use of forward-looking words or phrases such as "believe," "expect," "intend," "anticipate," "should," "planned," "estimated," and "potential," among others and include, but are not limited to, statements concerning our expectations regarding our operations, business, strategies, prospects, revenues, expenses, costs and resources. These forward-looking statements are subject to certain risks and uncertainties that could cause our actual results to differ materially from those anticipated results or other expectations reflected in the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in this report and other factors beyond our control, and in particular, the risks discussed in “Part II, Item 1A. Risk Factors” and those discussed in other documents we file with the SEC. All forward-looking statements included in this document are based on our current expectations, and we undertake no obligation to revise or publicly release the results of any revision to these forward-looking statements. Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements.

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OVERVIEW

    We were founded in 1977 to develop and manufacture burn-in and test equipment for the semiconductor industry. Since our inception, we have sold more than 2,500 systems to semiconductor manufacturers, semiconductor contract assemblers and burn-in and test service companies worldwide. Our principal products currently are the FOX full wafer contact parallel test and burn-in system, WaferPak contactors, the DiePak carrier, test fixtures and the Advanced Burn-in and Test System, or ABTS.

    Our net sales consist primarily of sales of systems, WaferPak contactors, DiePak carriers, test fixtures, upgrades and spare parts, revenues from service contracts, and engineering development charges. Our selling arrangements may include contractual customer acceptance provisions, which are mostly deemed perfunctory or inconsequential, and installation of the product occurs after shipment and transfer of title.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

    Our discussion and analysis of our financial condition and results of operations are based upon our condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of these condensed consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates, including those related to customer programs and incentives, product returns, bad debts, inventories, income taxes, financing operations, warranty obligations, and long-term service contracts. Our estimates are derived from historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Those results form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. For a discussion of the critical accounting policies, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Policies and Estimates” in our Annual Report on Form 10-K for the fiscal year ended May 31, 2019.

    There have been no material changes to our critical accounting policies and estimates during the six months ended November 30, 2019 compared to those discussed in our Annual Report on Form 10-K for the fiscal year ended May 31, 2019,except for the adoption of FASB ASC Topic 842, Leases, as discussed in Note “2. RECENT ACCOUNTING PRONOUNCEMENTS.”

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RESULTS OF OPERATIONS

    The following table sets forth items in our unaudited condensed consolidated statements of operations as a percentage of net sales for the periods indicated.

	Three Months Ended		Six Months Ended
	November 30,		November 30,
	2019	2018	2019	2018
Net sales	100.0%	100.0%	100.0%	100.0%
Cost of sales	53.4	59.4	55.9	62.9
Gross profit	46.6	40.6	44.1	37.1
Operating expenses:
Selling, general and administrative	31.4	33.5	31.9	36.2
Research and development	11.6	16.7	13.6	19.7
Total operating expenses	43.0	50.2	45.5	55.9
Income (loss) from operations	3.6	(9.6)	(1.4)	(18.8)
Interest income (expense), net	--	(1.3)	0.1	(1.4)
Other income, net	0.1	0.6	0.1	0.3
Income (loss) before income tax expense	3.7	(10.3)	(1.2)	(19.9)
Income tax expense	--	(0.3)	(0.1)	(0.2)
Net income (loss)	3.7	(10.6)	(1.3)	(20.1)
Less: Net income attributable to the noncontrolling interest	--	--	--	--
Net income (loss) attributable to Aehr Test Systems common shareholders	3.7%	(10.6)%	(1.3)%	(20.1)%

THREE MONTHS ENDED NOVEMBER 30, 2019 COMPARED TO THREE MONTHS ENDED NOVEMBER 30, 2018

    NET SALES. Net sales increased to $6.9 million for the three months ended November 30, 2019 from $5.9 million for the three months ended November 30, 2018, an increase of 16.3%. The increase in net sales for the three months ended November 30, 2019 was primarily due to the increase in net sales of our wafer-level products, partially offset by the decrease in net sales of our Test During Burn-in (TDBI) products. Net sales of the wafer-level products for the three months ended November 30, 2019 were $6.3 million, and increased approximately $2.1 million from the three months ended November 30, 2018. Net sales of the TDBI products for the three months ended November 30, 2019 were $539,000, and decreased approximately $1.1 million from the three months ended November 30, 2018.

    GROSS PROFIT. Gross profit increased to $3.2 million for the three months ended November 30, 2019 from $2.4 million for the three months ended November 30, 2018, an increase of approximately 33.5%. Gross profit margin increased to 46.6% for the three months ended November 30, 2019 from 40.6% for the three months ended November 30, 2018. The increase in gross profit margin was primarily the result of a change in mix of product sales, and manufacturing efficiencies due to an increase in net sales.

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    SELLING, GENERAL AND ADMINISTRATIVE. SG&A expenses increased to $2.2 million for the three months ended November 30, 2019 from $2.0 million for the three months ended November 30, 2018, an increase of 9.1%. The increase in SG&A expenses was primarily due to an increase in commissions and costs associated with new product introductions.

    RESEARCH AND DEVELOPMENT. R&D expenses decreased to $795,000 for the three months ended November 30, 2019 from $986,000 for the three months ended November 30, 2018, a decrease of 19.4%. The decrease in R&D expenses was primarily due to a decrease in employment related expenses and a reduction in R&D material expenses.

    INTEREST INCOME (EXPENSE), NET. Interest income, net for the three months ended November 30, 2019 was $2,000 compared with interest expense, net of $74,000 for the three months ended November 30, 2018. The decrease in interest expense for the three months ended November 30, 2019 was primarily due to the repayment of the Convertible Notes on the maturity date of April 10, 2019.

    OTHER INCOME, NET. Other income, net was $5,000 and $29,000 for the three months ended November 30, 2019 and 2018, respectively. The change in other income, net was primarily due to gains realized in connection with the fluctuation in the value of the dollar compared to foreign currencies during the referenced periods.

    INCOME TAX EXPENSE. Income tax expense was $6,000 and $19,000 for the three months ended November 30, 2019 and 2018, respectively.

SIX MONTHS ENDED NOVEMBER 30, 2019 COMPARED TO SIX MONTHS ENDED NOVEMBER 30, 2018

    NET SALES. Net sales increased to $12.4 million for the six months ended November 30, 2019 from $10.7 million for the six months ended November 30, 2018, an increase of 16.5%. The increase in net sales for the six months ended November 30, 2019 was primarily due to the increase in net sales of our wafer-level products, partially offset by the decrease in net sales of our TDBI products. Net sales of the wafer-level products for the six months ended November 30, 2019 were $11.2 million, and increased approximately $5.0 million from the six months ended November 30, 2018. Net sales of the TDBI products for the six months ended November 30, 2019 were $1.2 million, and decreased approximately $3.2 million from the six months ended November 30, 2018.

    GROSS PROFIT. Gross profit increased to $5.5 million for the six months ended November 30, 2019 from $4.0 million for the six months ended November 30, 2018, an increase of 38.5%. Gross profit margin increased to 44.1% for the six months ended November 30, 2019 from 37.1% for the six months ended November 30, 2018. The increase in gross profit margin was primarily the result of a change in mix of product sales, manufacturing efficiencies due to an increase in net sales, and a decrease in other cost of goods sold related to inventory scrap, and tooling and layout charges.

    SELLING, GENERAL AND ADMINISTRATIVE. SG&A expenses increased to $4.0 million for the six months ended November 30, 2019 from $3.9 million for the six months ended November 30, 2018, an increase of 2.8%. The increase in SG&A expenses was primarily due to an increase in commissions and costs associated with new product introductions.

    RESEARCH AND DEVELOPMENT. R&D expenses decreased to $1.7 million for the six months ended November 30, 2019 from $2.1 million for the six months ended November 30, 2018, a decrease of 19.7%. The decrease in R&D expenses was primarily due to a decrease in employment related expenses and a reduction in R&D material expenses.

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    INTEREST INCOME (EXPENSE), NET. Interest income, net for the six months ended November 30, 2019 was $14,000 compared with interest expense, net of $152,000 for the six months ended November 30, 2018. The decrease in interest expense for the six months ended November 30, 2019 was primarily due to the repayment of the Convertible Notes on the maturity date of April 10, 2019.

    OTHER INCOME, NET. Other income, net was $15,000 and $38,000 for the six months ended November 30, 2019 and 2018, respectively. The change in other income, net was primarily due to gains realized in connection with the fluctuation in the value of the dollar compared to foreign currencies during the referenced periods.

    INCOME TAX EXPENSE. Income tax expense was $12,000 and $23,000 for the six months ended November 30, 2019 and 2018, respectively.

LIQUIDITY AND CAPITAL RESOURCES

    Net cash used in operating activities was $276,000 and $3.0 million for the six months ended November 30, 2019 and 2018, respectively. For the six months ended November 30, 2019, net cash used in operating activities was primarily the result of net loss of $162,000, as adjusted to exclude the effect of non-cash charge of stock-based compensation expense of $404,000 and depreciation and amortization of $193,000. Net cash used in operations was also impacted by increases in inventories and accounts receivable of $627,000 and $372,000, respectively, and a decrease in accrued expenses of $438,000, partially offset by an increase in accounts payable of $389,000. The increase in accounts receivable was primarily due to large shipments toward the end of the quarter ended November 30, 2019. The increase in inventories and accounts payable were due primarily to inventory purchases to support future shipments. The decrease in accrued expenseswas primarily due to the restructuring payments to terminated employees impacted by the restructuring plan implemented last fiscal year 2019. For the six months ended November 30, 2018, net cash used in operating activities was primarily the result of net loss of $2.1 million, as adjusted to exclude the effect of non-cash charge of stock-based compensation expense of $480,000 and depreciation and amortization of $230,000. Net cash used in operations was also impacted by increases in accounts receivable and inventories of $1.1 million and $935,000, respectively, partially offset by an increase in accounts payable of $302,000 million and an increase in customer deposits and deferred revenue of $231,000. The increase in accounts receivable was primarily due to large shipments toward the end of the quarter ended November 30, 2018. The increase in inventories and accounts payable were due primarily to inventory purchases to support future shipments. The increase in customer deposits and deferred revenue was primarily due the receipt of additional down payments from certain customers.

    Net cash used in investing activities was $123,000 and $103,000 for the six months ended November 30, 2019 and 2018, respectively. Net cash used in investing activities during the six months ended November 30, 2019 and 2018 was due to purchases of property and equipment.

    Financing activities provided cash of $293,000 and $312,000 for the six months ended November 30, 2019 and 2018, respectively. Net cash provided by financing activities during the six months ended November 30, 2019 and 2018 was due to the proceeds from the issuance of common stock under employee plans.

    The effect of fluctuation in exchange rates decreased cash by $20,000 and $98,000 for the six months ended November 30, 2019 and 2018, respectively. The changes were due to the fluctuation in the value of the dollar compared to foreign currencies.

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    As of  November 30, 2019 and May 31, 2019, we had the same level of working capital of $14.5 million.

    We lease our manufacturing and office space under operating leases. We entered into a non-cancelable operating lease agreement for our United States manufacturing and office facilities, which was renewed in February 2018 and expires in July 2023. Under the lease agreement, we are responsible for payments of utilities, taxes and insurance.

    From time to time, we evaluate potential acquisitions of businesses, products or technologies that complement our business. If consummated, any such transactions may use a portion of our working capital or require the issuance of equity. We have no present understandings, commitments or agreements with respect to any material acquisitions.

    We anticipate that the existing cash balance together with income from operations, collections of existing accounts receivable, revenue from our existing backlog of products, the sale of inventory on hand, and deposits and down payments against significant orders will be adequate to meet our liquidity requirements for the next 12 months.

OFF-BALANCE SHEET ARRANGEMENTS

    We have not entered into any off-balance sheet financing arrangements and have not established any variable interest entities.

OVERVIEW OF CONTRACTUAL OBLIGATIONS

    There have been no material changes in the composition, magnitude or other key characteristics of our contractual obligations or other commitments as disclosed in the Company's Annual Report on Form 10-K for the year ended May 31, 2019.

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKS

    We had no holdings of derivative financial or commodity instruments as of November 30, 2019 or May 31, 2019.

    We are exposed to financial market risks, including changes in interest rates and foreign currency exchange rates. We only invest our short-term excess cash in government-backed securities with maturities of 18 months or less. We do not use any financial instruments for speculative or trading purposes. Fluctuations in interest rates would not have a material effect on our financial position, results of operations or cash flows.

    A majority of our revenue and capital spending is transacted in U.S. Dollars. We, however, enter into transactions in other currencies, primarily Euros and Japanese Yen. Since the price is determined at the time a purchase order is accepted, we are exposed to the risks of fluctuations in the foreign currency-U.S. Dollar exchange rates during the lengthy period from purchase order to ultimate payment. This exchange rate risk is partially offset to the extent that our subsidiaries incur expenses payable in their local currency. To date, we have not invested in instruments designed to hedge currency risks. In addition, our subsidiaries typically carry debt or other obligations due to us that may be denominated in either their local currency or U.S. Dollars. Since our subsidiaries’ financial statements are based in their local currency and our condensed consolidated financial statements are based in U.S. Dollars, we and our subsidiaries recognize foreign exchange gains or losses in any period in which the value of the local currency rises or falls in relation to the U.S. Dollar. A 10% decrease in the value of the subsidiaries’ local currency as compared with the U.S. Dollar would not be expected to result in a significant change to our net income or loss. There have been no material changes in our risk exposure since the end of the last fiscal year, nor are any material changes to our risk exposure anticipated.

27

Item 4. CONTROLS AND PROCEDURES

    EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES. Our management evaluated, with the participation of our Chief Executive Officer and our Chief Financial Officer, the effectiveness of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on this evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that our disclosure controls and procedures are effective to ensure that information we are required to disclose in reports that we file or submit under the Securities and Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms, and that such information is accumulated and communicated to management as appropriate to allow for timely decisions regarding required disclosure.

    CHANGES IN INTERNAL CONTROLS OVER FINANCIAL REPORTING. There was no change in our internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act, that occurred during the period covered by this Quarterly Report on Form 10-Q that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

    INHERENT LIMITATIONS OF INTERNAL CONTROLS. Our management, including our Chief Executive Officer and Chief Financial Officer, does not expect that our disclosure controls and procedures or our internal controls will prevent all error and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within us have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving our stated goals under all potential future conditions. Over time, controls may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

28

  PART II - OTHER INFORMATION

Item 1. LEGAL PROCEEDINGS

    None.

Item 1A. RISK FACTORS

    Please refer to the description of the risk factors associated with our business previously disclosed in Part I, Item 1A - "Risk Factors" of our Annual Report on Form 10-K for the year ended May 31, 2019 filed with the Securities and Exchange Commission on August 28, 2019.

Item 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

    None.

Item 3. DEFAULTS UPON SENIOR SECURITIES

    None.

Item 4. MINE SAFETY DISCLOSURES

    Not Applicable

Item 5. OTHER INFORMATION

    None.

Item 6. EXHIBITS

Exhibit No.	Description
31.1	Certification of Chief Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

*This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference in any filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any general incorporation language in any filings.

29

SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Aehr Test Systems
	(Registrant)
Date: January 14, 2020	By:	/s/ GAYN ERICKSON
		Gayn Erickson
		President and Chief Executive Officer

Date: January 14, 2020	By:	/s/ KENNETH B. SPINK
		Kenneth B. Spink
		Vice President of Finance and Chief Financial Officer

30

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 302(a) OF THE SARBANES-OXLEY ACT

I, Gayn Erickson, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Aehr Test Systems;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

    a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

    b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

 c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

 d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

    a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

    b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: January 14, 2020
	/s/ GAYN ERICKSON
	Gayn Erickson
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO SECTION 302(a) OF THE SARBANES-OXLEY ACT

I, Kenneth B. Spink, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Aehr Test Systems;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

 a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

 b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

 c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

 d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

  a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

  b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: January 14, 2020
	/s/ KENNETH B. SPINK
	Kenneth B. Spink
	Vice President of Finance and Chief Financial Officer

EX-32.1

Exhibit 32

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Gayn Erickson, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Aehr Test Systems on Form 10-Q for the period ended November 30, 2019 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Aehr Test Systems.

Date: January 14, 2020
	/s/ GAYN ERICKSON
	Gayn Erickson
	President and Chief Executive Officer

I, Kenneth B. Spink, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Aehr Test Systems on Form 10-Q for the period ended November 30, 2019 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Aehr Test Systems.

Date: January 14, 2020
	/s/ KENNETH B. SPINK
	Kenneth B. Spink
	Vice President of Finance and Chief Financial Officer

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4. EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Earnings Per Share [Abstract]
Numerator: Net income (loss)	$ 251	$ (629)	$ (162)	$ (2,144)
Denominator for basic net income (loss) per share: Weighted average shares outstanding (in thousands)	22,823	22,294	22,765	22,242
Shares used in basic net income (loss) per share calculation (in thousands)	22,823	22,294	22,765	22,242
Effect of dilutive securities (in thousands)	89	0	0	0
Denominator for diluted net income (loss) per share (in thousands)	22,912	22,294	22,765	22,242
Basic net income (loss) per share	$ 0.01	$ (0.03)	$ (0.01)	$ (0.10)
Diluted net income (loss) per share	$ 0.01	$ (0.03)	$ (0.01)	$ (0.10)

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3. REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Net sales	$ 6,874	$ 5,911	$ 12,407	$ 10,651
Systems
Net sales	3,027	3,712	5,961	5,518
Contactors
Net sales	3,046	943	4,696	2,096
Services
Net sales	801	1,256	1,750	3,037
Wafer-level
Net sales	6,335	4,226	11,161	6,195
Test During Burn-In
Net sales	$ 539	$ 1,685	$ 1,246	$ 4,456

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4. EARNINGS PER SHARE

6 Months Ended

Nov. 30, 2019

Earnings Per Share [Abstract]

4. EARNINGS PER SHARE

4. EARNINGS PER SHARE

    Basic earnings per share is determined using the weighted average number of common shares outstanding during the period. Diluted earnings per share is determined using the weighted average number of common shares and potential common shares (representing the dilutive effect of stock options, RSUs and ESPP shares) outstanding during the period using the treasury stock method.

    The following table presents the computation of basic and diluted net (loss) income per share attributable to Aehr Test Systems common shareholders (in thousands, except per share data):

	Three Months Ended					Six Months Ended
	November 30,					November 30,
	2019		2018			2019			2018
Numerator: Net income (loss)	$	251	$	(629	)	$	(162	)	$	(2,144	)
Denominator for basic net income (loss) per share:
Weighted average shares outstanding		22,823		22,294			22,765			22,242
Shares used in basic net income (loss) per share calculation		22,823		22,294			22,765			22,242
Effect of dilutive securities		89		—			—			—
Denominator for diluted net income (loss) per share		22,912		22,294			22,765			22,242
Basic net income (loss) per share	$	0.01	$	(0.03	)	$	(0.01	)	$	(0.10	)
Diluted net income (loss) per share	$	0.01	$	(0.03	)	$	(0.01	)	$	(0.10	)

    For the purpose of computing diluted earnings per share, the weighted average number of potential common shares does not include stock options with an exercise price greater than the average fair value of the Company’s common stock for the period, as the effect would be antidilutive. Stock options to purchase 2,919,000 shares of common stock were outstanding as of November 30, 2019, but were not included in the computation of diluted net income per share, because the inclusion of such shares would be antidilutive. In the three months ended November 30, 2018 and six months ended November 30, 2019 and 2018, potential common shares were not included in the calculation of diluted net loss per share as the effect would be antidilutive. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for these periods are the same. Stock options to purchase 3,373,000 shares of common stock, RSUs for 38,000 shares and ESPP rights to purchase 327,000 ESPP shares were outstanding as of November 30, 2018, but were not included in the computation of diluted net loss per share because the inclusion of such shares would be antidilutive. The 2,657,000 shares convertible under the 9% Convertible Secured Notes (the “Convertible Notes”) outstanding at November 30, 2018 were not included in the computation of diluted net loss per share because the inclusion of such shares would be antidilutive.

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8. PRODUCT WARRANTIES

6 Months Ended

Nov. 30, 2019

Product Warranties Disclosures [Abstract]

8. PRODUCT WARRANTIES

8. PRODUCT WARRANTIES

    The Company provides for the estimated cost of product warranties at the time revenues are recognized on the products shipped. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of its component suppliers, the Company’s warranty obligation is affected by product failure rates, material usage and service delivery costs incurred in correcting a product failure. Should actual product failure rates, material usage or service delivery costs differ from the Company’s estimates, revisions to the estimated warranty liability would be required.

    The standard warranty period is one year for systems and ninety days for parts and service.

    The following is a summary of changes in the Company's liability for product warranties during the three and six months ended November 30, 2019 and 2018 (in thousands):

	Three Months Ended						Six Months Ended
	November 30,						November 30,
	2019			2018			2019			2018
Balance at the beginning of the period	$	192		$	160		$	154		$	135
Accruals for warranties issued during the period		79			71			141			146
Consumption of reserves		(81	)		(68	)		(105	)		(118	)
Balance at the end of the period	$	190		$	163		$	190		$	163

    The accrued warranty balance is included in accrued expenses on the accompanying condensed consolidated balance sheets.

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12. STOCK-BASED COMPENSATION

6 Months Ended

Nov. 30, 2019

Share-based Payment Arrangement [Abstract]

12. STOCK-BASED COMPENSATION

12. STOCK-BASED COMPENSATION

    Stock-based compensation expense consists of expenses for stock options, restricted stock units, or RSUs, and employee stock purchase plan, or ESPP, purchase rights. Stock-based compensation expense for stock options and ESPP purchase rights is measured at each grant date, based on the fair value of the award using the Black-Scholes option valuation model, and is recognized as expense over the employee’s requisite service period. This model was developed for use in estimating the value of publicly traded options that have no vesting restrictions and are fully transferable. The Company’s employee stock options have characteristics significantly different from those of publicly traded options. For RSUs, stock-based compensation cost is based on the fair value of the Company’s common stock at the grant date. All of the Company’s stock-based compensation is accounted for as an equity instrument. See Note 10 in the Company’s Annual Report on Form 10-K for fiscal 2019 filed on August 28, 2019 for further information regarding the 2016 Equity Incentive Plan and the Amended and Restated 2006 ESPP.

    The following table summarizes the stock-based compensation expense for the three and six months ended November 30, 2019 and 2018 (in thousands):

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Cost of sales	$	19	$	23	$	39	$	59
Selling, general and administrative		135		136		264		284
Research and development		51		65		101		137
Total stock-based compensation	$	205	$	224	$	404	$	480

    As of November 30, 2019 and 2018, there were no stock-based compensation expenses capitalized as part of inventory.

    During the three months ended November 30, 2019 and 2018, the Company recorded stock-based compensation expense related to stock options and RSUs of $163,000 and $166,000, respectively. During the six months ended November 30, 2019 and 2018, the Company recorded stock-based compensation expense related to stock options and RSUs of $313,000 and $339,000, respectively.

    As of November 30, 2019, the total compensation expense related to unvested stock-based awards under the Company’s 2016 Equity Incentive Plan, but not yet recognized, was approximately $1,405,000, which is net of estimated forfeitures of $4,000. This expense will be amortized on a straight-line basis over a weighted average period of approximately 3.0 years.

    During the three months ended November 30, 2019 and 2018, the Company recorded stock-based compensation expense related to the ESPP of $42,000 and $58,000, respectively. During the six months ended November 30, 2019 and 2018, the Company recorded stock-based compensation expense related to the ESPP of $91,000 and $141,000, respectively.

    As of November 30, 2019, the total compensation expense related to purchase rights under the ESPP but not yet recognized was approximately $117,000. This expense will be amortized on a straight-line basis over a weighted average period of approximately 0.9 years.

Valuation Assumptions

    Valuation and Amortization Method. The Company estimates the fair value of stock options granted using the Black-Scholes option valuation model and a single option award approach. The fair value under the single option approach is amortized on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period.

    Expected Term. The Company’s expected term represents the period that the Company’s stock-based awards are expected to be outstanding and was determined based on historical experience, giving consideration to the contractual terms of the stock-based awards, vesting schedules and expectations of future employee behavior as evidenced by changes to the terms of its stock-based awards.

    Volatility. Volatility is a measure of the amounts by which a financial variable such as stock price has fluctuated (historical volatility) or is expected to fluctuate (expected volatility) during a period. The Company uses the historical volatility for the past four or five years, which matches the expected term of most of the option grants, to estimate expected volatility. Volatility for each of the ESPP’s four time periods of six months, twelve months, eighteen months, and twenty-four months is calculated separately and included in the overall stock-based compensation expense recorded.

    Risk-Free Interest Rate. The Company bases the risk-free interest rate used in the Black-Scholes option valuation model on the implied yield in effect at the time of option grant on U.S. Treasury zero-coupon issues with a remaining term equivalent to the expected term of the stock awards including the ESPP.

    Fair Value. The fair value of the Company’s stock options granted to employees for the three and six months ended November 30, 2019 and 2018 were estimated using the following weighted average assumptions in the Black-Scholes option valuation model:

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Expected term (in years)		5		5		5		5
Volatility		0.72		0.70		0.71		0.72
Risk-free interest rate		1.60%		3.01%		1.85%		2.84%
Weighted average grant date fair value	$	1.05	$	1.21	$	0.98	$	1.38

   The fair values of the ESPP purchase rights granted for the three and six months ended November 30, 2019 were estimated using the following weighted-average assumptions:

	Three and Six Months Ended
	November 30, 2019
Expected term (in years)		0.5-2.0
Volatility		0.62-0.71
Expected dividend	$	0.00
Risk-free interest rates		1.56% - 1.81%
Estimated forfeiture rate		0%
Weighted average grant date fair value	$	0.80

    During the three and six months ended November 30, 2019, ESPP purchase rights of 38,000 were granted. During the three and six months ended November 30, 2018, ESPP purchase rights of 327,000 were granted. Total ESPP shares issued during the three and six months ended November 30, 2019 and 2018 were 71,000 and 64,000 shares, respectively. As of November 30, 2019, there were 299,000 ESPP shares available for issuance.

    The following tables summarize the Company’s stock option and RSU transactions during three and six months ended November 30, 2019 (in thousands):

	Available
	Shares
Balance, May 31, 2019		1,147
Options granted		(527	)
Options cancelled		151
Options expired		(119	)
Balance, August 31, 2019		652
Options reserved		1,196
Options granted		(58	)
Options cancelled		280
Options expired		(256	)
Balance, November 30, 2019		1,814

    The following table summarizes the stock option transactions during the three and six months ended November 30, 2019 (in thousands, except per share data):

		Outstanding Options
					Weighted
		Number			Average		Aggregate
		of			Exercise		Intrinsic
		Shares			Price		Value
Balances, May 31, 2019		3,107		$	2.20	$	282
Options granted		527		$	1.64
Options cancelled		(151	)	$	1.50
Options exercised		(49	)	$	1.27
Balances, August 31, 2019		3,434		$	2.16	$	41
Options granted		58		$	1.77
Options cancelled		(280	)	$	2.19
Options exercised		(85	)	$	1.06
Balances, November 30, 2019	$	3,127		$	2.18	$	358
Options fully vested and expected to vest at November 30, 2019	$	3,091		$	2.18	$	354

    The options outstanding and exercisable at November 30, 2019 were in the following exercise price ranges (in thousands, except per share data):

		Options Outstanding						Options Exercisable
		at November 30, 2019						at November 30, 2019
Range of Exercise Prices		Number Outstanding Shares		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Number Exercisable Shares		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value
$	1.09-$1.28		260		0.57	$	1.28		260		0.57	$	1.28
$	1.64-$2.06		1,199		5.53	$	1.76		447		4.22	$	1.81
$	2.10-$2.81		1,439		3.13	$	2.43		1,146		2.48	$	2.43
$	3.46-$3.93		229		4.66	$	3.85		151		4.69	$	3.80
$	1.09-$3.93		3,127		3.95	$	2.18		2,004		2.79	$	2.25	$	219

    The total intrinsic value of options exercised during the three and six months ended November 30, 2019 was $50,000 and $67,000, respectively. The total intrinsic value of options exercised during the three and six months ended November 30, 2018 was $23,000 and $162,000, respectively. The weighted average remaining contractual life of the options exercisable and expected to be exercisable at November 30, 2019 was 3.93 years.

    There were no RSUs granted to employees during the three and six months ended November 30, 2019 and 2018. During the three and six months ended November 30, 2019, 3,000 and 7,000 RSUs became fully vested, respectively. During the three and six months ended November 30, 2018, 4,000 and 9,000 RSUs became fully vested, respectively. As of November 30, 2019, 16,000 RSUs were unvested which had an intrinsic value of $31,000. As of November 30, 2018, 38,000 RSUs were unvested which had an intrinsic value of $72,000.

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2. RECENT ACCOUNTING PRONOUNCEMENTS

6 Months Ended

Nov. 30, 2019

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

2. RECENT ACCOUNTING PRONOUNCEMENTS

2. RECENT ACCOUNTING PRONOUNCEMENTS

Accounting Standards Adopted

    Financial Instruments

    In January 2016, the FASB issued an accounting standard update related to the recognition and measurement of financial assets and financial liabilities. This standard changes accounting for equity investments and financial liabilities under the fair value option and the presentation and disclosure requirements for financial instruments. In addition, this standard clarifies guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. The Company adopted this new standard in fiscal year 2020. The adoption of this standard did not have a significant impact on the Company’s consolidated financial statements.

    Leases

    In February 2016, the FASB issued ASC Update No. 2016-02, Leases (FASB ASC Topic 842, Leases). The Company adopted the standard as of June 1, 2019, using the modified retrospective approach and the transition method provided by ASC Update No. 2018-11, Leases (Topic 842): Targeted Improvements. Under this method, the Company applied the new leasing rules on the date of adoption and recognized the cumulative effect of initially applying the standard as an adjustment to its opening balance sheet, rather than at the earliest comparative period presented in the financial statements. Prior periods presented are in accordance with the previous lease guidance under FASB ASC Topic 840, Leases.

    In addition, the Company applied the package of practical expedients permitted under FASB ASC Topic 842 transition guidance to its entire lease portfolio at June 1, 2019. As a result, the Company was not required to reassess (i) whether any expired or existing contracts are or contain leases, (ii) the classification of any expired or existing leases and (iii) the treatment of initial direct costs for any existing leases. Furthermore, the Company elected not to separate lease and non-lease components for the majority of its leases. Instead, for all applicable classes of underlying assets, the Company accounted for each separate lease component and the non-lease components associated with that lease component as a single lease component.

    As a result of adopting FASB ASC Topic 842, Leases on June 1, 2019, the Company recognized right-of-use assets of $2.7 million and corresponding liabilities of $2.8 million for its existing operating lease portfolio on its unaudited condensed consolidated balance sheet. Operating lease right-of-use assets are presented within Operating lease right-of-use assets and corresponding liabilities are presented within Operating lease liabilities, short-term and Operating lease liabilities, long-term on the Company’s unaudited condensed consolidated balance sheet. There was no material impact to the Company’s unaudited condensed consolidated statements of operations or unaudited condensed consolidated statements of cash flows. Please refer to Note “11. LEASES” for information regarding the Company’s lease portfolio as of November 30, 2019 as accounted for under FASB ASC Topic 842, Leases.

Accounting Standards Not Yet Adopted

    Financial Instruments

    In June 2016, the FASB issued an accounting standard update (“ASU”) that requires measurement and recognition of expected credit losses for financial assets held based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount. Due to a subsequent ASU in November 2019, the accounting standard will be effective for the Company beginning in the first quarter of fiscal 2024 on a modified retrospective basis, and early adoption in fiscal 2020 is permitted. The Company does not expect a material impact of this accounting standard on its consolidated financial statements.

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Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 251	$ (629)	$ (162)	$ (2,144)
Other comprehensive income (loss), net of tax:
Net change in cumulative translation adjustments	(5)	(34)	(20)	(49)
Total comprehensive income (loss)	246	(663)	(182)	(2,193)
Less: Comprehensive income attributable to the noncontrolling interest	0	1	(1)	2
Comprehensive income (loss), attributable to Aehr Test Systems common shareholders	$ 246	$ (664)	$ (181)	$ (2,195)

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12. STOCK-BASED COMPENSATION (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Stock-based compensation costs capitalized as part of inventory	$ 0	$ 0	$ 0	$ 0
Intrinsic value of options exercised	50	23	$ 67	162
Weighted average remaining contractual life of the options exercisable and expected to be exercisable			3 years 11 months 5 days
Stock Option and RSU Transactions
Stock-based compensation expense related to stock options and RSUs	$ 163	$ 166	$ 313	$ 339
Restricted Stock Units granted (in thousands)	0	0	0	0
Restricted Stock Units vested (in thousands)	3	4	7	9
Restricted Stock Units unvested (in thousands)	16	38	16	38
Restricted Stock Units unvested intrinsic value	$ 31	$ 72	$ 31	$ 72
2016 Equity Incentive Plan
Unrecognized stock-based compensation	1,405		1,405
Estimated forfeitures of unvested stock based awards, amount	4		$ 4
Weighted average period for recognition of costs			3 years
Employee Stock Purchase Plan
Weighted average period for recognition of costs			10 months 24 days
Stock-based compensation related to the ESPP	42	$ 58	$ 91	$ 141
Compensation cost related to purchase rights under the ESPP but not yet recognized	$ 117		$ 117
ESPP purchase right granted (in thousands)	38	327	38	327
ESPP shares issued (in thousands)	71	64	71	64
ESPP shares available for issuance (in thousands)	299		299

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Document and Entity Information - shares	6 Months Ended
	Nov. 30, 2019	Dec. 31, 2019
Document And Entity Information
Entity Registrant Name	AEHR TEST SYSTEMS
Entity Central Index Key	0001040470
Document Type	10-Q
Document Period End Date	Nov. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--05-31
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		22,915,648
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2020

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11. LEASES (Details 1) $ in Thousands	Nov. 30, 2019 USD ($)
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020 (excluding the first six months of 2020)	$ 366
2021	754
2022	772
2023	795
2024	132
Thereafter	0
Total future minimum operating lease payments	2,819
Less: imputed interest	276
Present value of operating lease liabilities	$ 2,543

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8. PRODUCT WARRANTIES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at the beginning of the period	$ 192	$ 160	$ 154	$ 135
Accruals for warranties issued during the period	79	71	141	146
Consumption of reserves	(81)	(68)	(105)	(118)
Balance at the end of the period	$ 190	$ 163	$ 190	$ 163

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3. REVENUE (Tables)

6 Months Ended

Nov. 30, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

    The Company’s revenues by product category are as follows (in thousands):

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Type of good / service:
Systems	$	3,027	$	3,712	$	5,961	$	5,518
Contactors		3,046		943		4,696		2,096
Services		801		1,256		1,750		3,037
	$	6,874	$	5,911	$	12,407	$	10,651
Product lines:
Wafer-level	$	6,335	$	4,226	$	11,161	$	6,195
Test During Burn-In		539		1,685		1,246		4,456
	$	6,874	$	5,911	$	12,407	$	10,651

    The following presents information about the Company’s operations in different geographic areas. Net sales are based upon ship-to location (in thousands):

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Geographic region:
United States	$	2,627	$	4,509	$	7,684	$	7,204
Asia		3,529		1,334		3,867		3,068
Europe		718		68		856		379
	$	6,874	$	5,911	$	12,407	$	10,651

    With the exception of the amount of service contracts and extended warranties, the Company’s product category revenues are recognized at the point in time when control transfers to customers.

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Timing of revenue recognition:
Products and services transferred at a point in time	$	6,322	$	5,272	$	11,181	$	9,390
Services transferred over time		552		639		1,226		1,261
	$	6,874	$	5,911	$	12,407	$	10,651

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8. PRODUCT WARRANTIES (Tables)

6 Months Ended

Nov. 30, 2019

Product Warranties Disclosures [Abstract]

Liability for product warranties

    The following is a summary of changes in the Company's liability for product warranties during the three and six months ended November 30, 2019 and 2018 (in thousands):

	Three Months Ended						Six Months Ended
	November 30,						November 30,
	2019			2018			2019			2018
Balance at the beginning of the period	$	192		$	160		$	154		$	135
Accruals for warranties issued during the period		79			71			141			146
Consumption of reserves		(81	)		(68	)		(105	)		(118	)
Balance at the end of the period	$	190		$	163		$	190		$	163

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11. LEASES (Details Narrative) $ in Thousands	3 Months Ended	6 Months Ended
	Nov. 30, 2019 USD ($)	Nov. 30, 2019 USD ($)
Operating lease, weighted-average remaining lease term	3 years 8 months 12 days	3 years 8 months 12 days
Operating lease, weighted-average discount rate	5.50%	5.50%
Operating lease, cost	$ 183	$ 366
Minimum
Operating lease term	1 year	1 year
Maximum
Operating lease term	4 years	4 years

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8. PRODUCT WARRANTIES (Details Narrative)	6 Months Ended
	Nov. 30, 2019
Product Warranties Disclosures [Abstract]
Product warranties disclosures	The standard warranty period is one year for systems and ninety days for parts and services

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2. RECENT ACCOUNTING PRONOUNCEMENTS (Policies)

6 Months Ended

Nov. 30, 2019

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

RECENT ACCOUNTING PRONOUNCEMENTS

2. RECENT ACCOUNTING PRONOUNCEMENTS

Accounting Standards Adopted

    Financial Instruments

    In January 2016, the FASB issued an accounting standard update related to the recognition and measurement of financial assets and financial liabilities. This standard changes accounting for equity investments and financial liabilities under the fair value option and the presentation and disclosure requirements for financial instruments. In addition, this standard clarifies guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. The Company adopted this new standard in fiscal year 2020. The adoption of this standard did not have a significant impact on the Company’s consolidated financial statements.

    Leases

    In February 2016, the FASB issued ASC Update No. 2016-02, Leases (FASB ASC Topic 842, Leases). The Company adopted the standard as of June 1, 2019, using the modified retrospective approach and the transition method provided by ASC Update No. 2018-11, Leases (Topic 842): Targeted Improvements. Under this method, the Company applied the new leasing rules on the date of adoption and recognized the cumulative effect of initially applying the standard as an adjustment to its opening balance sheet, rather than at the earliest comparative period presented in the financial statements. Prior periods presented are in accordance with the previous lease guidance under FASB ASC Topic 840, Leases.

    In addition, the Company applied the package of practical expedients permitted under FASB ASC Topic 842 transition guidance to its entire lease portfolio at June 1, 2019. As a result, the Company was not required to reassess (i) whether any expired or existing contracts are or contain leases, (ii) the classification of any expired or existing leases and (iii) the treatment of initial direct costs for any existing leases. Furthermore, the Company elected not to separate lease and non-lease components for the majority of its leases. Instead, for all applicable classes of underlying assets, the Company accounted for each separate lease component and the non-lease components associated with that lease component as a single lease component.

    As a result of adopting FASB ASC Topic 842, Leases on June 1, 2019, the Company recognized right-of-use assets of $2.7 million and corresponding liabilities of $2.8 million for its existing operating lease portfolio on its unaudited condensed consolidated balance sheet. Operating lease right-of-use assets are presented within Operating lease right-of-use assets and corresponding liabilities are presented within Operating lease liabilities, short-term and Operating lease liabilities, long-term on the Company’s unaudited condensed consolidated balance sheet. There was no material impact to the Company’s unaudited condensed consolidated statements of operations or unaudited condensed consolidated statements of cash flows. Please refer to Note “11. LEASES” for information regarding the Company’s lease portfolio as of November 30, 2019 as accounted for under FASB ASC Topic 842, Leases.

Accounting Standards Not Yet Adopted

    Financial Instruments

    In June 2016, the FASB issued an accounting standard update (“ASU”) that requires measurement and recognition of expected credit losses for financial assets held based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount. Due to a subsequent ASU in November 2019, the accounting standard will be effective for the Company beginning in the first quarter of fiscal 2024 on a modified retrospective basis, and early adoption in fiscal 2020 is permitted. The Company does not expect a material impact of this accounting standard on its consolidated financial statements.

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7. INVENTORIES (Tables)

6 Months Ended

Nov. 30, 2019

Inventory Disclosure [Abstract]

Inventories

    Inventories are comprised of the following (in thousands):                                                                          

	November 30, 2019		May 31, 2019
Raw materials and sub-assemblies	$	6,562	$	5,471
Work in process		3,053		3,580
Finished goods		185		10
	$	9,800	$	9,061

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4. EARNINGS PER SHARE (Details Narrative) - shares	6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Employee Stock Purchase Plan
Options not included in the computation of diluted net income (loss) per share (in thousands)		327
Convertible Notes
Options not included in the computation of diluted net income (loss) per share (in thousands)		2,657
Stock Options
Options not included in the computation of diluted net income (loss) per share (in thousands)	2,919	3,373
Restricted Stock Units
Options not included in the computation of diluted net income (loss) per share (in thousands)		38

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3. REVENUE (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Net sales	$ 6,874	$ 5,911	$ 12,407	$ 10,651
US
Net sales	2,627	4,509	7,684	7,204
Asia
Net sales	3,529	1,334	3,867	3,068
Europe
Net sales	$ 718	$ 68	$ 856	$ 379

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11. LEASES

6 Months Ended

Nov. 30, 2019

Leases [Abstract]

11. LEASES

11. LEASES

    The Company has only operating leases for real estate including corporate offices, warehouse space and certain equipment. A lease with an initial term of 12 months or less is generally not recorded on the condensed consolidated balance sheet, unless the arrangement includes an option to purchase the underlying asset, or renew the arrangement that the Company is reasonably certain to exercise (short-term leases). The Company recognizes lease expense on a straight-line basis over the lease term for short-term leases that the Company does not record on its balance sheet. The Company’s operating leases have remaining lease terms of 1 to 4 years.

    The Company determines whether an arrangement is or contains a lease based on the unique facts and circumstances present at the inception of the arrangement. Operating lease liabilities and their corresponding right-of-use assets are recorded based on the present value of lease payments over the expected lease term. The interest rate implicit in lease contracts is typically not readily determinable.

    As such, the Company utilizes the appropriate incremental borrowing rate, which is the rate incurred to borrow on a collateralized basis over a similar term at an amount equal to the lease payments in a similar economic environment. Certain adjustments to the right-of-use asset may be required for items such as initial direct costs paid or incentives received.

    The weighted-average remaining lease term for the Company’s operating leases was 3.7 years at November 30, 2019 and the weighted-average discount rate was 5.5%.

    The Company’s operating lease cost was $183,000 and $366,000 for the three and six months ended November 30, 2019, respectively.

    The following table presents supplemental cash flow information related to the Company’s operating leases (in thousands):

	Three Months Ended		Six Months Ended
	November 30, 2019		November 30, 2019
Cash paid for amounts included in the measurement of operating lease liabilities
Operating cash flows from operating leases	$	184	$	366

    The following table presents the maturities of the Company’s operating lease liabilities as of November 30, 2019 (in thousands):

Fiscal year	Operating Leases
2020 (excluding the first six months of 2020)	$	366
2021		754
2022		772
2023		795
2024		132
Thereafter		—
Total future minimum operating lease payments	$	2,819
Less: imputed interest		276
Present value of operating lease liabilities	$	2,543

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3. REVENUE

6 Months Ended

Nov. 30, 2019

Revenue from Contract with Customer [Abstract]

3. REVENUE

3. REVENUE

Revenue recognition

    The Company recognizes revenue when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services by following a five-step process: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price, and (5) recognize revenue when or as the Company satisfies a performance obligation, as further described below.

    Performance obligations include sales of systems, contactors, spare parts, and services, as well as installation and training services included in customer contracts.

    A contract’s transaction price is allocated to each distinct performance obligation. In determining the transaction price, the Company evaluates whether the price is subject to refund or adjustment to determine the net consideration to which the Company expects to be entitled. The Company generally does not grant return privileges, except for defective products during the warranty period.

    For contracts that contain multiple performance obligations, the Company allocates the transaction price to the performance obligations on a relative standalone selling price basis. Standalone selling prices are based on multiple factors including, but not limited to historical discounting trends for products and services and pricing practices in different geographies.

    Revenue for systems and spares are recognized at a point in time, which is generally upon shipment or delivery. Revenue from services is recognized over time as services are completed or ratably over the contractual period of generally one year or less.

    The Company has elected the practical expedient to not assess whether a contract has a significant financing component as the Company’s standard payment terms are less than one year.

Disaggregation of revenue

    The following tables show revenues by major product categories. Within each product category, contract terms, conditions and economic factors affecting the nature, amount, timing and uncertainty around revenue recognition and cash flow are substantially similar.

    The Company’s revenues by product category are as follows (in thousands):

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Type of good / service:
Systems	$	3,027	$	3,712	$	5,961	$	5,518
Contactors		3,046		943		4,696		2,096
Services		801		1,256		1,750		3,037
	$	6,874	$	5,911	$	12,407	$	10,651
Product lines:
Wafer-level	$	6,335	$	4,226	$	11,161	$	6,195
Test During Burn-In		539		1,685		1,246		4,456
	$	6,874	$	5,911	$	12,407	$	10,651

    The following presents information about the Company’s operations in different geographic areas. Net sales are based upon ship-to location (in thousands):

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Geographic region:
United States	$	2,627	$	4,509	$	7,684	$	7,204
Asia		3,529		1,334		3,867		3,068
Europe		718		68		856		379
	$	6,874	$	5,911	$	12,407	$	10,651

    With the exception of the amount of service contracts and extended warranties, the Company’s product category revenues are recognized at the point in time when control transfers to customers.

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Timing of revenue recognition:
Products and services transferred at a point in time	$	6,322	$	5,272	$	11,181	$	9,390
Services transferred over time		552		639		1,226		1,261
	$	6,874	$	5,911	$	12,407	$	10,651

Contract balances

    A receivable is recognized in the period the Company delivers goods or provides services or when the Company’s right to consideration is unconditional. The Company usually does not record contract assets because the Company has an unconditional right to payment upon satisfaction of the performance obligation, and therefore, a receivable is more commonly recorded than a contract asset.

    Contract liabilities include payments received in advance of performance under a contract and are satisfied as the associated revenue is recognized. Contract liabilities are reported on the Condensed Consolidated Balance Sheets at the end of each reporting period as a component of deferred revenue. Contract liabilities as of November 30, 2019 and May 31, 2019 were $1,873,000 and $1,734,000, respectively. During the three and six months ended November 30, 2019, the Company recognized $132,000 and $1,181,000, respectively, of revenues that were included in contract liabilities as of May 31, 2019.

Remaining performance obligations

    On November 30, 2019, the Company had $415,000 of remaining performance obligations, which were comprised of deferred service contracts and extended warranty contracts not yet delivered. The Company expects to recognize approximately 50% of its remaining performance obligations as revenue in fiscal 2020, and an additional 50% in fiscal 2021 and thereafter. The foregoing excludes the value of other remaining performance obligations as they have original durations of one year or less, and also excludes information about variable consideration allocated entirely to a wholly unsatisfied performance obligation.

Costs to obtain or fulfill a contract

    The Company generally expenses sales commissions when incurred as a component of selling, general and administrative expense as the amortization period is typically less than one year. Additionally, the majority of the Company’s cost of fulfillment as a manufacturer of products is classified as inventory and fixed assets, which are accounted for under the respective guidance for those asset types. Other costs of contract fulfillment are immaterial due to the nature of the Company’s products and their respective manufacturing process.

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7. INVENTORIES

6 Months Ended

Nov. 30, 2019

Inventory Disclosure [Abstract]

7. INVENTORIES

7. INVENTORIES

    Inventories are comprised of the following (in thousands):                                                                          

	November 30, 2019		May 31, 2019
Raw materials and sub-assemblies	$	6,562	$	5,471
Work in process		3,053		3,580
Finished goods		185		10
	$	9,800	$	9,061

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12. STOCK-BASED COMPENSATION (Details 4) $ / shares in Units, $ in Thousands	6 Months Ended
	Nov. 30, 2019 USD ($) $ / shares shares
$1.09-$1.28
Options outstanding, ending (in thousands) | shares	260
Weighted average remaining contractual life (years) options outstanding	6 months 25 days
Weighted average exercise price outstanding, ending | $ / shares	$ 1.28
Options exercisable shares, ending (in thousands) | shares	260
Weighted average remaining contractual life (years) options exercisable	6 months 25 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 1.28
$1.64-$2.06
Options outstanding, ending (in thousands) | shares	1,199
Weighted average remaining contractual life (years) options outstanding	5 years 6 months 11 days
Weighted average exercise price outstanding, ending | $ / shares	$ 1.76
Options exercisable shares, ending (in thousands) | shares	447
Weighted average remaining contractual life (years) options exercisable	4 years 2 months 19 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 1.81
$2.10-$2.81
Options outstanding, ending (in thousands) | shares	1,439
Weighted average remaining contractual life (years) options outstanding	3 years 1 month 17 days
Weighted average exercise price outstanding, ending | $ / shares	$ 2.43
Options exercisable shares, ending (in thousands) | shares	1,146
Weighted average remaining contractual life (years) options exercisable	2 years 5 months 23 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 2.43
$3.46-$3.93
Options outstanding, ending (in thousands) | shares	229
Weighted average remaining contractual life (years) options outstanding	4 years 7 months 28 days
Weighted average exercise price outstanding, ending | $ / shares	$ 3.85
Options exercisable shares, ending (in thousands) | shares	151
Weighted average remaining contractual life (years) options exercisable	4 years 8 months 8 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 3.80
$1.09-$3.93
Options outstanding, ending (in thousands) | shares	3,127
Weighted average remaining contractual life (years) options outstanding	3 years 11 months 12 days
Weighted average exercise price outstanding, ending | $ / shares	$ 2.18
Options exercisable shares, ending (in thousands) | shares	2,004
Weighted average remaining contractual life (years) options exercisable	2 years 9 months 15 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 2.25
Aggregate intrinsic value for options exercisable | $	$ 219

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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Income Statement [Abstract]
Net sales	$ 6,874	$ 5,911	$ 12,407	$ 10,651
Cost of sales	3,672	3,513	6,934	6,700
Gross profit	3,202	2,398	5,473	3,951
Operating expenses:
Selling, general and administrative	2,157	1,977	3,965	3,856
Research and development	795	986	1,687	2,102
Total operating expenses	2,952	2,963	5,652	5,958
Income (loss) from operations	250	(565)	(179)	(2,007)
Interest income (expense), net	2	(74)	14	(152)
Other income, net	5	29	15	38
Income (loss) before income tax expense	257	(610)	(150)	(2,121)
Income tax expense	(6)	(19)	(12)	(23)
Net income (loss)	251	(629)	(162)	(2,144)
Less: Net income attributable to the noncontrolling interest	0	0	0	0
Net income (loss) attributable to Aehr Test Systems common shareholders	$ 251	$ (629)	$ (162)	$ (2,144)
Net income (loss) per share basic	$ 0.01	$ (0.03)	$ (0.01)	$ (0.10)
Net income (loss) per share diluted	$ 0.01	$ (0.03)	$ (0.01)	$ (0.10)
Shares used in per share calculations: basic (in thousands)	22,823	22,294	22,765	22,242
Shares used in per share calculations: diluted (in thousands)	22,912	22,294	22,765	22,242

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1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

6 Months Ended

Nov. 30, 2019

Accounting Policies [Abstract]

1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES

1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES

    The accompanying financial information has been prepared by Aehr Test Systems, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission, or SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (GAAP) have been condensed or omitted pursuant to such rules and regulations.

    In the opinion of management, the unaudited condensed consolidated financial statements for the interim periods presented have been prepared on a basis consistent with the May 31, 2019 audited consolidated financial statements and reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the condensed consolidated financial position and results of operations as of and for such periods indicated. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended May 31, 2019. Results for the interim periods presented herein are not necessarily indicative of results which may be reported for any other interim period or for the entire fiscal year.

    PRINCIPLES OF CONSOLIDATION. The condensed consolidated financial statements include the accounts of Aehr Test Systems and its subsidiaries (collectively, the "Company"). All significant intercompany balances have been eliminated in consolidation. For the Company’s majority owned subsidiary, Aehr Test Systems Japan K.K., the noncontrolling interest of the portion the Company does not own was reflected on the Condensed Consolidated Balance Sheets in Shareholders’ Equity and in the Condensed Consolidated Statements of Operations.

    ACCOUNTING ESTIMATES. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Estimates are used to account for sales and revenue allowances, the allowance for doubtful accounts, inventory valuations, income taxes, stock-based compensation expenses, and product warranties, among others. The Company bases its estimates on historical experience and on various other assumptions that it believes to be reasonable under the circumstances. Actual results could differ materially from those estimates.

    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES. The Company’s significant accounting policies are disclosed in the Company’s Annual Report on Form 10-K for the year ended May 31, 2019. There have been no significant changes in the Company’s significant accounting policies during the three and six months ended November 30, 2019, except for the adoption of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Update No. 2016-02, Leases, as discussed in Note “2. RECENT ACCOUNTING PRONOUNCEMENTS.”

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12. STOCK-BASED COMPENSATION (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Stock Options
Expected term (in years)	5 years	5 years	5 years	5 years
Volatility	72.00%	70.00%	71.00%	72.00%
Risk-free interest rate	1.60%	3.01%	1.85%	2.84%
Weighted average grant date fair value	$ 1.05	$ 1.21	$ .98	$ 1.38
Employee Stock Purchase Plan
Expected dividend	$ 0		$ 0
Estimated forfeiture rate	0.00%		0.00%
Weighted average grant date fair value	$ .80		$ .80
Employee Stock Purchase Plan | Minimum
Expected term (in years)	6 months		6 months
Volatility	62.00%		62.00%
Risk-free interest rate	1.56%		1.56%
Employee Stock Purchase Plan | Maximum
Expected term (in years)	2 years		2 years
Volatility	71.00%		71.00%
Risk-free interest rate	1.81%		1.81%

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11. LEASES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Nov. 30, 2019	Nov. 30, 2019
Cash paid for amounts included in measurement of operating lease liabilities:
Operating cash flows from operating leases	$ 184	$ 366

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7. INVENTORIES (Details) - USD ($) $ in Thousands	Nov. 30, 2019	May 31, 2019
Inventory, Net [Abstract]
Raw materials and sub-assemblies	$ 6,562	$ 5,471
Work in process	3,053	3,580
Finished goods	185	10
Inventory	$ 9,800	$ 9,061	[1]

[1] The condensed consolidated balance sheet at May 31, 2019 has been derived from the audited consolidated financial statements at that date.

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13. SEGMENT INFORMATION

6 Months Ended

Nov. 30, 2019

Segment Reporting [Abstract]

13. SEGMENT INFORMATION

13. SEGMENT INFORMATION

    The Company has only one reportable segment. The information for revenue category by type, product line, geography and timing of revenue recognition, is summarized in Note “3. REVENUE.”

    Property and equipment information is based on the physical location of the assets. The following table presents property and equipment information for geographic areas (in thousands):

	November 30, 2019		May 31, 2019
United States	$	821	$	1,005
Asia		39		40
Europe		—		—
	$	860	$	1,045

    As of November 30, 2019, the operating lease right-of-use assets of $2,387,000 are allocated in the United States.

    There were no revenues through distributors for the three and six months ended November 30, 2019 and 2018.

    The Company’s Japanese and German subsidiaries primarily comprise the foreign operations. Substantially all of the sales of the subsidiaries are made to unaffiliated Japanese or European customers. Net sales from outside the United States include those of Aehr Test Systems Japan K.K. and Aehr Test Systems GmbH.

    Sales to the Company’s five largest customers accounted for approximately 95% and 88% of its net sales in the three and six months ended November 30, 2019, respectively. Two customers accounted for approximately 44% and 32% of the Company’s net sales in the three months ended November 30, 2019. Three customers accounted for approximately 42%, 24% and 10% of the Company’s net sales in the six months ended November 30, 2019. Sales to the Company’s five largest customers accounted for approximately 94% and 83% of its net sales in the three and six months ended November 30, 2018, respectively. Three customers accounted for approximately 55%, 13% and 13% of the Company’s net sales in the three months ended November 30, 2018. Four customers accounted for approximately 33%, 16%, 15% and 13% of the Company’s net sales in the six months ended November 30, 2018. No other customers represented more than 10% of the Company’s net sales in the three and six months ended November 30, 2019 and 2018.

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4. EARNINGS PER SHARE (Tables)

6 Months Ended

Nov. 30, 2019

Earnings Per Share [Abstract]

Earnings per share

    The following table presents the computation of basic and diluted net (loss) income per share attributable to Aehr Test Systems common shareholders (in thousands, except per share data):

	Three Months Ended					Six Months Ended
	November 30,					November 30,
	2019		2018			2019			2018
Numerator: Net income (loss)	$	251	$	(629	)	$	(162	)	$	(2,144	)
Denominator for basic net income (loss) per share:
Weighted average shares outstanding		22,823		22,294			22,765			22,242
Shares used in basic net income (loss) per share calculation		22,823		22,294			22,765			22,242
Effect of dilutive securities		89		—			—			—
Denominator for diluted net income (loss) per share		22,912		22,294			22,765			22,242
Basic net income (loss) per share	$	0.01	$	(0.03	)	$	(0.01	)	$	(0.10	)
Diluted net income (loss) per share	$	0.01	$	(0.03	)	$	(0.01	)	$	(0.10	)

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9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM (Tables)

6 Months Ended

Nov. 30, 2019

Customer Deposits And Deferred Revenue Short-term

Customer deposits and deferred revenue

    Customer deposits and deferred revenue, short-term (in thousands):

	November 30, 2019		May 31, 2019
Customer deposits	$	1,458	$	1,003
Deferred revenue		351		542
	$	1,809	$	1,545

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5. FAIR VALUE OF FINANCIAL INSTRUMENTS

6 Months Ended

Nov. 30, 2019

Fair Value Disclosures [Abstract]

5. FAIR VALUE OF FINANCIAL INSTRUMENTS

5. FAIR VALUE OF FINANCIAL INSTRUMENTS

    The Company’s financial instruments are measured at fair value consistent with authoritative guidance. This authoritative guidance defines fair value, establishes a framework for using fair value to measure assets and liabilities, and disclosures required related to fair value measurements.

    The guidance establishes a fair value hierarchy based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon their own market assumptions. The fair value hierarchy consists of the following three levels:

Level 1 - instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets.

Level 2 - instrument valuations are obtained from readily-available pricing sources for comparable instruments.

Level 3 - instrument valuations are obtained without observable market values and require a high level of judgment to determine the fair value.

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of November 30, 2019 (in thousands):

	Balance as of
	November 30, 2019		Level 1		Level 2		Level 3
Money market funds	$	1,838	$	1,838	$	—	$	—
Assets	$	1,838	$	1,838	$	—	$	—

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of May 31, 2019 (in thousands):

	Balance as of
	May 31, 2019		Level 1		Level 2		Level 3
Money market funds	$	3,017	$	3,017	$	—	$	—
Assets	$	3,017	$	3,017	$	—	$	—

    Included in Money market funds as of November 30, 2019 and May 31, 2019 is $80,000 restricted cash representing a security deposit for the Company’s United States manufacturing and office space lease.

    There were no financial liabilities measured at fair value as of November 30, 2019 and May 31, 2019.

    There were no transfers between Level 1 and Level 2 fair value measurements during the three and six months ended November 30, 2019.

    The carrying amounts of financial instruments including cash, cash equivalents, receivables, accounts payable and certain other accrued liabilities, approximate fair value due to their short maturities.

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9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM

6 Months Ended

Nov. 30, 2019

Customer Deposits And Deferred Revenue Short-term

9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM

9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM

    Customer deposits and deferred revenue, short-term (in thousands):

	November 30, 2019		May 31, 2019
Customer deposits	$	1,458	$	1,003
Deferred revenue		351		542
	$	1,809	$	1,545

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5. FAIR VALUE OF FINANCIAL INSTRUMENTS (Details Narrative) - USD ($) $ in Thousands	Nov. 30, 2019	May 31, 2019
Fair Value Disclosures [Abstract]
Restricted cash representing a security deposit	$ 80	$ 80
Financial liabilities at fair value	0	0
Transfers between Level 1 and Level 2 fair value measurements	$ 0	$ 0

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3. REVENUE (Details Narrative) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Nov. 30, 2019	Nov. 30, 2019	May 31, 2021	May 31, 2020	May 31, 2019
Revenue from Contract with Customer [Abstract]
Contract liabilities	$ 1,873	$ 1,873			$ 1,734
Recognition of contract liabilities	132	1,181
Remaining performance obligations	$ 415	$ 415
Remaining performance obligation revenue recognition			50.00%	50.00%

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13. SEGMENT INFORMATION (Tables)

6 Months Ended

Nov. 30, 2019

Segment Reporting [Abstract]

Company's operations in different geographic areas

    Property and equipment information is based on the physical location of the assets. The following table presents property and equipment information for geographic areas (in thousands):

	November 30, 2019		May 31, 2019
United States	$	821	$	1,005
Asia		39		40
Europe		—		—
	$	860	$	1,045

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12. STOCK-BASED COMPENSATION (Details 2) - Stock Option and RSU Transactions - shares	3 Months Ended
	Nov. 30, 2019	Aug. 31, 2019
Available shares, beginning (in thousands)	652	1,147
Options reserved (in thousands)	1,196
Options granted (in thousands)	(58)	(527)
Options cancelled (in thousands)	280	151
Options expired (in thousands)	(256)	(119)
Available shares, ending (in thousands)	1,814	652

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Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Total Aehr Test Shareholders' Equity	Noncontrolling Interest	Total
Beginning balance, shares (in thousands) at May. 31, 2018	22,143
Beginning balance, amount at May. 31, 2018	$ 221	$ 83,041	$ 2,292	$ (66,249)	$ 19,305	$ (20)	$ 19,285
Issuance of common stock under employee plans, shares (in thousands)	213
Issuance of common stock under employee plans, amount	$ 3	309			312		312
Stock-based compensation		480			480		480
Net (loss) income				(2,144)	(2,144)		(2,144)
Foreign currency translation adjustment			(51)		(51)	2	(49)
Ending balance, shares (in thousands) at Nov. 30, 2018	22,356
Ending balance, amount at Nov. 30, 2018	$ 224	83,830	2,241	(68,393)	17,902	(18)	17,884
Beginning balance, shares (in thousands) at Aug. 31, 2018	22,245
Beginning balance, amount at Aug. 31, 2018	$ 222	83,405	2,276	(67,764)	18,139	(19)	18,120
Issuance of common stock under employee plans, shares (in thousands)	111
Issuance of common stock under employee plans, amount	$ 2	201			203		203
Stock-based compensation		224			224		224
Net (loss) income				(629)	(629)		(629)
Foreign currency translation adjustment			(35)		(35)	1	(34)
Ending balance, shares (in thousands) at Nov. 30, 2018	22,356
Ending balance, amount at Nov. 30, 2018	$ 224	83,830	2,241	(68,393)	17,902	(18)	17,884
Beginning balance, shares (in thousands) at May. 31, 2019	22,669
Beginning balance, amount at May. 31, 2019	$ 227	84,499	2,230	(71,484)	15,472	(19)	15,453	[1]
Issuance of common stock under employee plans, shares (in thousands)	245
Issuance of common stock under employee plans, amount	$ 2	291			293		293
Stock-based compensation		404			404		404
Net (loss) income				(162)	(162)		(162)
Foreign currency translation adjustment			(19)		(19)	(1)	(20)
Ending balance, shares (in thousands) at Nov. 30, 2019	22,914
Ending balance, amount at Nov. 30, 2019	$ 229	85,194	2,211	(71,646)	15,988	(20)	15,968
Beginning balance, shares (in thousands) at Aug. 31, 2019	22,721
Beginning balance, amount at Aug. 31, 2019	$ 227	84,760	2,216	(71,897)	15,306	(20)	15,286
Issuance of common stock under employee plans, shares (in thousands)	193
Issuance of common stock under employee plans, amount	$ 2	229			231		231
Stock-based compensation		205			205		205
Net (loss) income				251	251		251
Foreign currency translation adjustment			(5)		(5)		(5)
Ending balance, shares (in thousands) at Nov. 30, 2019	22,914
Ending balance, amount at Nov. 30, 2019	$ 229	$ 85,194	$ 2,211	$ (71,646)	$ 15,988	$ (20)	$ 15,968

[1] The condensed consolidated balance sheet at May 31, 2019 has been derived from the audited consolidated financial statements at that date.

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Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Nov. 30, 2019	May 31, 2019
ASSETS
Cash and cash equivalents	$ 5,302	$ 5,428	[1]
Accounts receivable, net	5,231	4,859	[1]
Inventories	9,800	9,061	[1]
Prepaid expenses and other current assets	534	686	[1]
Total current assets	20,867	20,034	[1]
Property and equipment, net	860	1,045	[1]
Operating lease right-of-use assets	2,387	0	[1]
Other assets	186	228	[1]
Total assets	24,300	21,307	[1]
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	2,320	1,933	[1]
Accrued expenses	1,596	2,034	[1]
Operating lease liabilities, short-term	619	0	[1]
Customer deposits and deferred revenue, short-term	1,809	1,545
Total current liabilities	6,344	5,512	[1]
Operating lease liabilities, long-term	1,924	0	[1]
Deferred rent	0	153	[1]
Deferred revenue, long -term	64	189	[1]
Total liabilities	8,332	5,854	[1]
Aehr Test Systems shareholders' equity:
Common stock, $0.01 par value: Authorized: 75,000 shares; Issued and outstanding: 22,914 shares and 22,669 shares at November 30, 2019 and May 31, 2019, respectively	229	227	[1]
Additional paid-in capital	85,194	84,499	[1]
Accumulated other comprehensive income	2,211	2,230	[1]
Accumulated deficit	(71,646)	(71,484)	[1]
Total Aehr Test Systems shareholders' equity	15,988	15,472	[1]
Noncontrolling interest	(20)	(19)	[1]
Total shareholders' equity	15,968	15,453	[1]
Total liabilities and shareholders' equity	$ 24,300	$ 21,307	[1]

[1] The condensed consolidated balance sheet at May 31, 2019 has been derived from the audited consolidated financial statements at that date.

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13. SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	Nov. 30, 2019	May 31, 2019
Property and equipment, net	$ 860	$ 1,045	[1]
US
Property and equipment, net	821	1,005
Asia
Property and equipment, net	39	40
Europe
Property and equipment, net	$ 0	$ 0

[1] The condensed consolidated balance sheet at May 31, 2019 has been derived from the audited consolidated financial statements at that date.

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6. ACCOUNTS RECEIVABLE, NET

6 Months Ended

Nov. 30, 2019

Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]

6. ACCOUNTS RECEIVABLE, NET

6. ACCOUNTS RECEIVABLE, NET

    Accounts receivable represent customer trade receivables. As of November 30, 2019 and May 31, 2019, there were no allowances for doubtful accounts. Accounts receivable are derived from the sale of products throughout the world to semiconductor manufacturers, semiconductor contract assemblers, electronics manufacturers and burn-in and test service companies. The Company’s allowance for doubtful accounts is based upon historical experience and review of trade receivables by aging category to identify specific customers with known disputes or collection issues. Uncollectible receivables are recorded as bad debt expense when all efforts to collect have been exhausted and recoveries are recognized when they are received.

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10. INCOME TAXES

6 Months Ended

Nov. 30, 2019

Income Tax Disclosure [Abstract]

10. INCOME TAXES

10. INCOME TAXES

    Income taxes have been provided using the liability method whereby deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and net operating loss and tax credit carryforwards measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse or the carryforwards are utilized. Valuation allowances are established when it is determined that it is more likely than not that such assets will not be realized.

    Since fiscal 2009, a full valuation allowance was established against all deferred tax assets as management determined that it is more likely than not that certain deferred tax assets will not be realized.

    The Company accounts for uncertain tax positions consistent with authoritative guidance. The guidance prescribes a “more likely than not” recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The Company does not expect any material change in its unrecognized tax benefits over the next twelve months. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income taxes.

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3. REVENUE (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Net sales	$ 6,874	$ 5,911	$ 12,407	$ 10,651
Products and services transferred at a point in time
Net sales	6,322	5,272	11,181	9,390
Services transferred over time
Net sales	$ 552	$ 639	$ 1,226	$ 1,261

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12. STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Nov. 30, 2019

Share-based Payment Arrangement [Abstract]

Compensation costs related to the Company's stock-based compensation

    The following table summarizes the stock-based compensation expense for the three and six months ended November 30, 2019 and 2018 (in thousands):

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Cost of sales	$	19	$	23	$	39	$	59
Selling, general and administrative		135		136		264		284
Research and development		51		65		101		137
Total stock-based compensation	$	205	$	224	$	404	$	480

Fair value assumptions for option valuation model

    The fair value of the Company’s stock options granted to employees for the three and six months ended November 30, 2019 and 2018 were estimated using the following weighted average assumptions in the Black-Scholes option valuation model:

	Three Months Ended				Six Months Ended
	November 30,				November 30,
	2019		2018		2019		2018
Expected term (in years)		5		5		5		5
Volatility		0.72		0.70		0.71		0.72
Risk-free interest rate		1.60%		3.01%		1.85%		2.84%
Weighted average grant date fair value	$	1.05	$	1.21	$	0.98	$	1.38

   The fair values of the ESPP purchase rights granted for the three and six months ended November 30, 2019 were estimated using the following weighted-average assumptions:

	Three and Six Months Ended
	November 30, 2019
Expected term (in years)		0.5-2.0
Volatility		0.62-0.71
Expected dividend	$	0.00
Risk-free interest rates		1.56% - 1.81%
Estimated forfeiture rate		0%
Weighted average grant date fair value	$	0.80

Stock option and RSU transactions

    The following tables summarize the Company’s stock option and RSU transactions during three and six months ended November 30, 2019 (in thousands):

	Available
	Shares
Balance, May 31, 2019		1,147
Options granted		(527	)
Options cancelled		151
Options expired		(119	)
Balance, August 31, 2019		652
Options reserved		1,196
Options granted		(58	)
Options cancelled		280
Options expired		(256	)
Balance, November 30, 2019		1,814

Stock option transactions

    The following table summarizes the stock option transactions during the three and six months ended November 30, 2019 (in thousands, except per share data):

		Outstanding Options
					Weighted
		Number			Average		Aggregate
		of			Exercise		Intrinsic
		Shares			Price		Value
Balances, May 31, 2019		3,107		$	2.20	$	282
Options granted		527		$	1.64
Options cancelled		(151	)	$	1.50
Options exercised		(49	)	$	1.27
Balances, August 31, 2019		3,434		$	2.16	$	41
Options granted		58		$	1.77
Options cancelled		(280	)	$	2.19
Options exercised		(85	)	$	1.06
Balances, November 30, 2019	$	3,127		$	2.18	$	358
Options fully vested and expected to vest at November 30, 2019	$	3,091		$	2.18	$	354

Options outstanding

    The options outstanding and exercisable at November 30, 2019 were in the following exercise price ranges (in thousands, except per share data):

		Options Outstanding						Options Exercisable
		at November 30, 2019						at November 30, 2019
Range of Exercise Prices		Number Outstanding Shares		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Number Exercisable Shares		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value
$	1.09-$1.28		260		0.57	$	1.28		260		0.57	$	1.28
$	1.64-$2.06		1,199		5.53	$	1.76		447		4.22	$	1.81
$	2.10-$2.81		1,439		3.13	$	2.43		1,146		2.48	$	2.43
$	3.46-$3.93		229		4.66	$	3.85		151		4.69	$	3.80
$	1.09-$3.93		3,127		3.95	$	2.18		2,004		2.79	$	2.25	$	219

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5. FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Nov. 30, 2019	May 31, 2019
Assets
Investment securities	$ 1,838	$ 3,017
Level 1
Assets
Investment securities	1,838	3,017
Level 2
Assets
Investment securities	0	0
Level 3
Assets
Investment securities	0	0
Money Market Funds
Assets
Investment securities	1,838	3,017
Money Market Funds | Level 1
Assets
Investment securities	1,838	3,017
Money Market Funds | Level 2
Assets
Investment securities	0	0
Money Market Funds | Level 3
Assets
Investment securities	$ 0	$ 0

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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Cash flows from operating activities:
Net loss	$ (162)	$ (2,144)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	404	480
Recovery of doubtful accounts	0	(3)
Depreciation and amortization	193	230
Changes in operating assets and liabilities:
Accounts receivable	(372)	(1,068)
Inventories	(627)	(935)
Prepaid expenses and other assets	194	23
Accounts payable	389	302
Accrued expenses	(438)	(175)
Customer deposits and deferred revenue	139	231
Deferred rent	0	84
Income taxes payable	4	18
Net cash used in operating activities	(276)	(2,957)
Cash flows from investing activities:
Purchases of property and equipment	(123)	(103)
Net cash used in investing activities	(123)	(103)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee plans, net of taxes paid related to share settlement of equity awards	293	312
Net cash provided by financing activities	293	312
Effect of exchange rates on cash and cash equivalents	(20)	(98)
Net decrease in cash, cash equivalents and restricted cash	(126)	(2,846)
Cash, cash equivalents and restricted cash, beginning of period	5,508	16,848
Cash, cash equivalents and restricted cash, end of period	5,382	14,002
Supplemental disclosure of non-cash flow information:
Transfers of property and equipment to inventories	$ 112	$ 0

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12. STOCK-BASED COMPENSATION (Details 3) - Outstanding Options Stock Option Transactions - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Nov. 30, 2019	Aug. 31, 2019
Options outstanding, beginning (in thousands)	3,434	3,107
Options granted (in thousands)	58	527
Options cancelled (in thousands)	(280)	(151)
Options exercised (in thousand)	(85)	(49)
Options outstanding, ending (in thousands)	3,127	3,434
Weighted average exercise price outstanding, beginning	$ 2.16	$ 2.20
Weighted average exercise price granted	1.77	1.64
Weighted average exercise price cancelled	2.19	1.50
Weighted average exercise price exercised	1.06	1.27
Weighted average exercise price outstanding, ending	$ 2.18	$ 2.16
Aggregate intrinsic value, beginning balance	$ 41	$ 282
Aggregate intrinsic value, ending balance	$ 358	$ 41
Options fully vested and expected to vest, ending (in thousands)	3,091
Weighted average exercise price for options fully vested and expected to vest, ending	$ 2.18
Aggregate intrinsic value for options fully vested and expected to vest, ending	$ 354

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13. SEGMENT INFORMATION (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018	May 31, 2019	[1]
Operating lease right-of-use assets	$ 2,387		$ 2,387		$ 0
Five Largest Customers
Customers accounted for 10% or more of total revenues	95.00%	94.00%	88.00%	83.00%
Customer A
Customers accounted for 10% or more of total revenues	44.00%	55.00%	42.00%	33.00%
Customer B
Customers accounted for 10% or more of total revenues	32.00%	13.00%	24.00%	16.00%
Customer C
Customers accounted for 10% or more of total revenues	13.00%		10.00%	15.00%
Customer D
Customers accounted for 10% or more of total revenues				13.00%

[1] The condensed consolidated balance sheet at May 31, 2019 has been derived from the audited consolidated financial statements at that date.

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Nov. 30, 2019	May 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in thousands)	75,000	75,000
Common stock, shares issued (in thousands)	22,914	22,669
Common stock, shares outstanding (in thousands)	22,914	22,669

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9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM (Details) - USD ($) $ in Thousands	Nov. 30, 2019	May 31, 2019
Customer Deposits And Deferred Revenue Short-term
Customer deposits	$ 1,458	$ 1,003
Deferred revenue	351	542
Total	$ 1,809	$ 1,545

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6. ACCOUNTS RECEIVABLE, NET (Details Narrative) - USD ($) $ in Thousands	Nov. 30, 2019	May 31, 2019
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Allowance for doubtful accounts customer trade receivables	$ 0	$ 0

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12. STOCK-BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Total stock-based compensation	$ 205	$ 224	$ 404	$ 480
Cost of Sales
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Total stock-based compensation	19	23	39	59
Selling, General and Administrative
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Total stock-based compensation	135	136	264	284
Research and Development
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Total stock-based compensation	$ 51	$ 65	$ 101	$ 137

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11. LEASES (Tables)

6 Months Ended

Nov. 30, 2019

Leases [Abstract]

Supplemental cash flow information related to leases

    The following table presents supplemental cash flow information related to the Company’s operating leases (in thousands):

	Three Months Ended		Six Months Ended
	November 30, 2019		November 30, 2019
Cash paid for amounts included in the measurement of operating lease liabilities
Operating cash flows from operating leases	$	184	$	366

Future minimum lease payments under operating leases

    The following table presents the maturities of the Company’s operating lease liabilities as of November 30, 2019 (in thousands):

Fiscal year	Operating Leases
2020 (excluding the first six months of 2020)	$	366
2021		754
2022		772
2023		795
2024		132
Thereafter		—
Total future minimum operating lease payments	$	2,819
Less: imputed interest		276
Present value of operating lease liabilities	$	2,543

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1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

6 Months Ended

Nov. 30, 2019

Accounting Policies [Abstract]

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES

    BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES. The accompanying financial information has been prepared by Aehr Test Systems, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission, or SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (GAAP) have been condensed or omitted pursuant to such rules and regulations.

    In the opinion of management, the unaudited condensed consolidated financial statements for the interim periods presented have been prepared on a basis consistent with the May 31, 2019 audited consolidated financial statements and reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the condensed consolidated financial position and results of operations as of and for such periods indicated. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended May 31, 2019. Results for the interim periods presented herein are not necessarily indicative of results which may be reported for any other interim period or for the entire fiscal year.

PRINCIPLES OF CONSOLIDATION

    PRINCIPLES OF CONSOLIDATION. The condensed consolidated financial statements include the accounts of Aehr Test Systems and its subsidiaries (collectively, the "Company"). All significant intercompany balances have been eliminated in consolidation. For the Company’s majority owned subsidiary, Aehr Test Systems Japan K.K., the noncontrolling interest of the portion the Company does not own was reflected on the Condensed Consolidated Balance Sheets in Shareholders’ Equity and in the Condensed Consolidated Statements of Operations.

ACCOUNTING ESTIMATES

    ACCOUNTING ESTIMATES. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Estimates are used to account for sales and revenue allowances, the allowance for doubtful accounts, inventory valuations, income taxes, stock-based compensation expenses, and product warranties, among others. The Company bases its estimates on historical experience and on various other assumptions that it believes to be reasonable under the circumstances. Actual results could differ materially from those estimates.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES. The Company’s significant accounting policies are disclosed in the Company’s Annual Report on Form 10-K for the year ended May 31, 2019. There have been no significant changes in the Company’s significant accounting policies during the three and six months ended November 30, 2019, except for the adoption of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Update No. 2016-02, Leases, as discussed in Note “2. RECENT ACCOUNTING PRONOUNCEMENTS.”

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5. FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Nov. 30, 2019

Fair Value Disclosures [Abstract]

Fair value by hierarchy

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of November 30, 2019 (in thousands):

	Balance as of
	November 30, 2019		Level 1		Level 2		Level 3
Money market funds	$	1,838	$	1,838	$	—	$	—
Assets	$	1,838	$	1,838	$	—	$	—

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of May 31, 2019 (in thousands):

	Balance as of
	May 31, 2019		Level 1		Level 2		Level 3
Money market funds	$	3,017	$	3,017	$	—	$	—
Assets	$	3,017	$	3,017	$	—	$	—